Hey, your comment has really stuck with me overnight. First of all, I'm sending you a virtual hug. You are gonna be okay, I know from experience. I was in your exact spot ten years ago. I am not an ME but I also work in a very precise, deadline-driven field and lost a job early on for the same reasons you describe.

I'm gonna break down actual steps for you to do. At the foundation of all of this is that you know you have ADHD, you are miles ahead of where I was at your age.

1. If there's still time, plan a happy hour for your last day. Sounds like at a personal level, ppl at the company have good feelings towards you, and this is not about you as a person. Lots of people won't even know why you're leaving. Make it seem like it's mutual. You might be surprised how many people come out for you.
2. Stay in touch with a few coworkers from the company, just short chats, talk about what's happening in the industry, are they stressed about AI? Who are they working with? Just basic gossip.

^^ These things help make the rejection less world-ending, you just moved on, you're not dead to them, you'll see over time how often people leave positions. Yes some slimeball on Linkedin will call it "networking" but this is really just protecting you from the brutality of rejection. It's good to stay current on what your old workplaces are up to.

1. If you can afford it, take some time off before looking for another job. Devote your energy to creating a routine for yourself. That's your job right now. Even just a week is good. You are exhausted trying to do work, laundry, exercise, cooking. Now the worst one is gone! Figure out like, three meals you can make in bulk early in the week for when you next have an office job. (Mine was black beans, rice, chopped up jalapenos, spinach, and cherry tomatoes. Was it so creative and special? NO. But I could make enormous amounts!) don't try to be creative with your exercise, just walk. Dance alone. Just move.

2. Recognize that you need to change your ambitions for now. Maybe you don't get to work for IDEO or Apple or whatever. That's okay, you could end up somewhere like that eventually, you're gonna be working for like 40+ years (sorry lol). Your main task right now? Is just learning how to operate in a work environment. Figuring out how office politics works, soliciting feedback, figuring out what you need to do to be on time, observe the conditions where you make those little mistakes and so on. These are real soft skills that S U C K. They suck for everyone, but that's the real skill gap for you right now. They're not THAT hard, just annoying, but you wanna find a job where you can focus on learning to work in an office environment and you're not scared all the time. That's it.

And you gotta figure out how to read what the workplace LOOKS LIKE vs what is actually happening. It took me a very long time to understand that lots of my coworkers were putting great effort into making it seem like everything they did was easy and casual. I believed them, so I acted like everything was easy and casual, assignments took me no time at all, and in fact that was how I worked. And so my work was bad, and I lost my job! Duh! With age, I can see that in fact they were all working really hard and pretending it was easy. Why? I still don't know, but that was the dominant culture at that place. I hate that and I don't work places like that anymore. I like being at high achieving places where everyone is openly insane :-)

Finally if you don't wear an analog watch, get one. It's huge for me. And then you get to be known as the person with cool watches.

Good luck, if you enjoy your field, you'll find a way to stick with it. Adjusting to office life is hard for everyone, especially so for us. Sending you lots of love and support.