I don't believe so, studied a lot. Open to being wrong but doesn't seem flat. I've heard all the flat earth arguments. If it was flat and we were all tricked that'd be a treat to find out. Doesn't seem likely. Hopefully someone proves it flat but don't think it will. Bible and firmament and all that may be metaphor. Could be a gigantic orrery.

Maybe

No

Absolutely not. I've debated flat earthers and seen a ton of attempts at proof, and every single piece of evidence they have is flawed and dependent on not fully understanding physics.

In places. Also quite bumpy in others.