I'd recommend pop os over bazzite because it's a more standard distro, bazzite is immutible (update entire system at once instead of individual apps, and part of the filesystem are read only. It's harder to break stuff on an immutible distro, but they're less common and most resources online are for normal distros). It isn't hard to get nvdia drivers working on pop os, so I'd just google it after you get it set up.
I'd make sure your windows drive is unplugged before installing, so you don't accidentally wipe it! I've never dealt with swapping what drive the os is on, but I'd expect some stuff to break because the filesystem is pointing to unique IDs that no longer match. That shouldn't be hard to fix by googling the errors, but I'd watch out for it.
Windows updates like to mess up bootloaders sometimes, I've never had that happen, so I don't have any advice there. Unplugging the windows drive when you instsl should help, and just make sure the default is to boot into linux, that way any auto restarts won't get into windows to mess stuff up unless you let it.