Not exactly autistic but ADHD, I was on the brink of a positive autism result. I'm able to do work and stuff, its just harder for me to remember things normally and I need to be able to take a break sometimes.
If you watch reels/'tok I recommend you cut it out entirely. It actually does have an effect, it adds on to the base amount from being a sperg. Like
>>103993 says also eat better, and don't touch drugs.
If you have a poor attention span by default, there is a trick in shitty establishments to get breaks. Buy a vape or find a used one on the floor, not to smoke, but to pretend to smoke so you can get breaks now and then. Once you're outside just take a moment to empty your mind and focus in again. Try to avoid the actual smoking areas, so you won't get caught, and also because they smell.