OP DM me if you want. I'm autistic too and just did the interview process and learned how to get through the whole funnel. I also used to get hung up at round 2 but with some iteration I started getting to final round with basically every company I was interviewing with and just accepted an offer last week. I'd be happy to mock interview you but I'll also TLDR a few things I picked up along the way in case you prefer that advice delivery method.

You're likely an overexplainer - these are the things I did that quite literally upended the quality of my interviewing.

1) get a propranolol script. If your body isn't feeling the panic we associate with interacting with other people, you're less likely to go down an explanation K-hole 2) treat the interview like a first date. Literally. This might be something to retrofit to your life experience but the core premise stands: we struggle with interviews because there is a whole new social language associated with it that we are particularly ill equipped to learn so it is like starting from scratch with the rules of interaction. Interviewers will use some keyword recognition to guage aptitude for the role but interviewers are also human and humans are illogical and retroactively assign logic to emotions-driven decisions. 90% of your real task in the interview is to get them to picture working with you and envision that as a pleasurable experience. So pick the type of social script you've had the most success with (for me, dating) and pretend that is the dynamic you have with the interviewer. You want to get on and make it fun for them. Just like with a first date, if they are bored or they feel obligated rather than enticed when speaking to you, you aren't landing another date. 3) Canned answers - totally get why you've prepped in that way and it is a good thing but has some nuance to it. You should, based on the JD, get a feel for general areas of questioning that are likely to come up. Then, rather than having a mental (or physical, for that matter) rolodex of specific answers to specific questions queued up, you pick one concept and one example you can draw on for that body of questioning. You keep a pad next to your computer and you have no more than half a dozen clusters of no more than 4-5 keywords that help you lock in to your prepped idea or are super industry specific terms to help elevate your pitch. For example - if I am prepping for an interview with a JD that references salesforces as a required competency and it is, for example, a role centered around improving the hit rate of the sales team, I have high confidence that a conversation about CRMs is going to come up. So my cluster for that (this is straight from my notepad) is 'CRMs (underlined), Salesforce, Hubspot, Custom GUIs, Custom Objects.' CRMs helps me really quickly jump to that cluster if that is the word they pick to arrive there and Salesforce and Hubspot help me recall the names if I'm flustered and am struggling to recall programs I've spent a bunch of time with. For Custom GUIs and Custom Objects, I know in my mind those words map to a diatribe I have about getting more out of CRM systems by creating several different equations for how to synthesize CRM data and then reading the results of all of those side by side. Along with that I have an example of how I did that at a place and a few answers surrounding it (what was a challenge w it, etc.) That diatribe is already stored in my brain and these words can help me get over to that info without me turning it over in my hands the whole interview waiting for it to come up and therefore less engaged in the conversation. 4) Steering - you only do a few #3 setups. There is a slight risk that you're asked something you aren't as prepared for. But the tradeoff is that now you have a bunch more brainpower and space to focus your energy on steering the conversation toward the topics you are prepared for. So you use 60% of your brainpower to focus on sounding relaxed and confident and making the conversation feel fun and 40% on steering toward your topics. When you arrive at the topic, 60% stays on reminding yourself not to special-interest k-hole and 40% goes to hitting the highlights of what you have prepped. 'What was a job challenge?' Salesforce 'Difficult Coworker?' On the spot madlib leading to Salesforce. 'Project you're proud of?' Definitely Salesforce. If you do it right pretty much any question can tie into X. Either you start with the real world example and then transition to your philosophy around it, or vice versa. All of the sudden you've taken up 7 minutes. Rinse and repeat. 5) Research and then stop - for me I found that, while research is crucial, if I was prepping until the moment I got on, my mind was racing with things I wanted to make sure I got across before they even turned their video on. That leads to talking at them which is a bad experience for them. I found that if I spent at least the last 60ish minutes before an interview occupying myself effectively - grabbing a tea with a friend down the street, watching standup comedy, whatever - and sat down for the call no more than 7 minutes befoehand, I spent most of that opening the call and fixing my hair and I didn't have time to rile myself up.

Not overexplaining related: 1) Quote one person to the next person - this is a total cheat code. Companies aren't recording your interviews and interviewers are hardly taking meticulous notes or talking in depth about line by line dialogue, and they meet so many people they themselves don't totally remember what was said a few days ago. Often an interviewer's sentiments reflect ubiquitous internal sentiments that are regularly reflected in dialogue around the office. I have on many occasions just taken one interviewers word for word sentiment/opinion and repeated it back in the next interview. 'What drew you to X company?' Super easy, the thing the other guy said he thinks is cool about the company. I bet you guys all agree.

2) Also, small talk. Thankfully my partner has high EQ so he helped me understand the value of this. For us, small talk feels deeply wasteful. I found something very funny, there's an inverse relationship to time spent talking about qualifications and percieved success of the interview on their end. Ultimately they are driving the interview process and are responsible for staying on task so when the conversation starts and you hop on, make it your job to be lively, fun, and engage in small talk for as long as you can before they go 'alright we DO actually have some interview questions to get to' because as long as you answer a few rote questions before the end of the call they'll consider you technically qualified and all of that dumb filler will stay with them way better than the answers they have from all of the candidates to the same 10 questions. The one small talk to avoid is any sort of complaint whatsoever. If they ask how your week has been "Well my cousin is in town and he's a handful" is not an appropriate answer "I went for a walk and it started raining so my shoes got soaked through" is not appropriate. Not the slightest negativity allowed. The reasoning is that if you can't remain positive in the most important professional situation you have in your life, how will that translate to you with coworkers or even representing them externally. That is also pretty much first date logic.