I really want to say that all the low hanging fruit has been picked, but in truth, new fruit pop up all the time, waiting to be discovered.
New problems pop up, which are waiting to even be identified before solutions can be thought of.
New technologies pop up, which are waiting to be connected to existing problems, either solving them for the first time, or replacing a previous solution.
To be honest, I don't know how many of these projects I've thought over in my head, only to find that they either require too much time, or have already been solved.
I think satvikpendem is right, start to work on literally anything, and try to notice problems you encounter along the way, maybe a neat little project hides there..
My suggestion for "literally anything" would be some low-effort creative project, like starting to take a picture every day, or write a sentence of prose, or listen to a song you've never heard before.. And do _anything_ with the output, either put it out in the world, or keep it to yourself.. Your project may come from trying to manage it all..
My current project is a backup solution that suits me, that's build on top of zfs, it's mostly bash scripts, it might never be public.