in my case it has been the "fear to destroy" a good idea.
nonsense.
one of the nesescary skills is to be able to finish tracks.
if you're afraid to ruin your idea, what good comes of it?
so finishing tracks is also something that comes with practice, and there are many aspects to this
but the main one is just to do, don't think "perfect" for now - just do and come up with songs.

I don't think you'll think their perfect, but I've never met a musician that does (and don't want to ).

having fun with the process leads to good ideas, fear of destroying hides them.

good luck.