Is building a proxy startup (copycat) actually a bad move? I will not promote

I’ve been really into the idea of starting a startup for years now, it’s one of those thoughts that just doesn’t leave my head, and since I’m finishing my master CS degree soon I finally want to go for it instead of just thinking about it. The problem is I have zero ideas, even though I’ve read a ton of books, Paul Graham essays and watched countless YC videos that all basically boil down to the same advice about solving a niche problem or “living in the future,” which honestly feels pretty abstract most of