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.

Creativity is just connecting two or more seemingly unrelated things, and combining them into something new. People with autism are definitely capable of doing that, even if it might require a non-traditional approach or different ways of getting there for you.

You can start generating ideas just by practising combining different things and seeing what happens. For example, maybe you like music. Take your favourite tune and try it with instruments that were never intended to play it. Speed up different parts and add a new beat to match a different song you enjoy, slow parts down, change the key, etc. If you like the result, keep adding. Maybe you'll find a pattern in the combination you enjoy and you can combine that with something else. Maybe you don't like it, start with 2 different new ingredients. Or still use it and think about what you could add or take away to like it more.

It doesn't have to be music, it could be programming or drawing or data analytics or writing or cooking or lego or anything.

By practising combining things snd evaluating the result, you are generating ideas. At some point eventually, one of them will be something you enjoy building on.

Add in a dash of "trying something new" if you think you can manage that too!