How should one come up with an idea? - eviltoast

like what are the best methods to get the brain active to create something, most of the things i want to require an idea but the truth is i have nothing and im not sure how to get an idea or if its even possible for me due to my autism or how my brain works.

maybe im just being hard on myself i use to come up with so many ideas but theses days i have nothing or just half a mess that i cant seem to finish cleaning, if that makes sense.

is there a suggestion, tip, method, or something that can get my brain started. if your wondering what im trying to do i would like to make a short comic i feel if doing so i might learn something or it would be interesting. i heard sticky notes are good but i dont want a room full of sticky notes, that just dosent seem right?