[diedead]

I don't have any tips to add here other than I feel you and I have dealt with similar feelings when I was doing my uni degree (I haven't done a thesis or something similar mainly because I hate writing long form stuff!)

I used to procrastinate working on assignments or watching lectures because I was afraid I wouldn't understand the content and I'd fulfill the belief that I was not smart enough to be studying comp sci, which inevitably led to not having enough time to properly study and understand the content or do assignments!

But over time it took me a little less time in order for me to get started on that assignment or watch that lecture. You're most likely not going to greatly improve your organisation overnight, but as long as you are seeing small bits of progress, that's what matters.