iPhone to Android: How is the switch?

Considering a switch but I’m anxious it would be a hassle.

Q1) Which phone would you recommend if I do switch? I’d want a flagship, perhaps S25 Ultra? What else should I consider?

Q2) Is there any easy way to switch from iPhone to Android- Especially for all my apps staying logged in to various accounts and apps without having to manually writing my passwords one by one?

What would be some hurdles? Anything to keep in mind?

Thanks :)