Ok well if you are neurodivergent, a couple things:
Autism self diagnosis is valid if you do your research. University of WA recently did a study that figured that out.
ADHD typically needs a diagnosis from a professional to be sure, but it’s not super hard to guess if you have it. Some symptoms of ADHD can be caused by other conditions (anxiety especially) so navigate that one with caution.
If you are neurodivergent, typically the answer is routines rather than habits. I find them much easier to implement. Just decide the task you want to make into a routine, decide the steps you want to do it in, and then decide to always do it that way, or at least until you want to optimize or tweak it. A simple routine I do is “keys, wallet, phone, ear buds” while tapping my pockets on the way out of the door.