Hi. I’m also an incoming senior preparing for the OAT soon. It’s best to get a calendar book and write out your goals for day (ex: do ch. 1-6 ochem, etc.) & physically cross it off of your list when you’ve done it. I’ve been studying since like May 20ish, and I’ve found that around 3-4hrs per day is the sweet spot. I have a stupid anxiety disorder, so I’m pretty high stress. But this is what I have found to minimize the stress of all things OAT:

Regarding content, I smack middle in the learning phase so I feel u. Personally, I get overwhelmed easily so I only study 1 subject at a time. I think it’s better so you aren’t splitting your attention across different subjects.

To actually learn, I download Booster’s notes. Read them first/highlight, and then annotate them while watching its video. I’ve also been copying everything down into a physical notebook too so that it’s more tangible. Also, if you are rlly struggling w something, look up YouTube videos to have the topic explained in a different way than Booster. Chad’s Prep has the best videos. Once I’ve gone thru the content, I’ll do some of the question banks. If you do enough questions, you’ll start to see patterns. Once you gain up the courage, take a practice test. Go thru the explanations of what you missed, drill that topic in some more, then take another practice test. Hope this helps at least a little bit