I’m all for people learning, and if someone has an idea for how to do something better, that’s great. But the OP asked extremely vague questions about entering

I’m all for people learning, and if someone has an idea for how to do something better, that’s great. But the OP asked extremely vague questions about entering a complex, highly-regulated, capital-intensive, safety-critical industry with no indication of having any kind of goal or relevant background knowledge. If they’re serious, then the obvious first step is “hire someone who knows how not to get electrocuted”, not “ask Hacker News to create a business plan for me”. (Which is a bit insulting, by the way — do your own homework!)