What I found in my experience is that an idea is great but until you start working on it, you will not know if you're passionate/interested/capable/ready for it.

I have a lot of projects/ideas that I am working on or want to work on. I jump from one project to the next until there is one that really grasps me, then I try to finish till completion. Most people have shallow understandings of a lot of things. Only with deep knowledge does innovation or sparks of it come to being. So with your interest in a lot of subjects (Energy, AI, Healthcare) try to learn a little of them in the beginning beyond shallow understanding. MAybe you will find something from that.