[Question] What to do if you can’t form any habits whatsoever?

A lot of LW posts are about making habits and routines, whether it’s TAPs, making to-do lists or checklists automatic, overcoming akrasia, becoming more productive, or more.

As for me, I have ADHD and ASD. I don’t think I’ve ever been able to form automatic habits or routines, including ones I did daily, such as brushing my teeth or taking a shower. I don’t eat or sleep at a set time, and was never able to consistently go to uni or work.

Is anyone here similar? What do you guys do, and do you have any tips to help with that?