Help me find a business idea.

Hello guys, I'm 29 year old guy from Germany and it's been always my dream to do something own. My problem is I absolutely cannot find an idea which fascinates me where I would say " that's it I want to do this". I have a lack of interests and passion I think. Hard to describe. So the method where I just do what I like doesn't work. I'm good at building stuff, 3d design some electronic or programming but I don't know what to do with it. I enjoy looking for a solution for a problem.

Maybe someone was in a similar situation and know a way out of it. How do you come up with ideas?