I touched on this elsewhere, but seeing your comment here… sort of.
iso image is like a .zip it’s a specific type of file… one that opens into a larger image, namely your entire distro. So you could install windows with an iso file. In order to be useful though, you need to get it onto a flash drive, but not just dragging and dropping. Programs like Rufus, mentioned elsewhere, will take that iso of Bazzite and open it onto the flash drive in a way that the computer will be able to read it later and do something with it.
After you have a working flash drive, you do not boot windows like normal and run the installer from a USB. You’ll have to figure out how to tell your laptop (different but similar for each brand of laptop) to boot from the USB. This usually involves having the USB in the drive, restarting your computer and hitting a specific key to tell it not to boot normally to windows, but instead boot from the flash drive.
I haven’t used Windows in a while and I think there’s also a way to restart windows and tell it to boot from USB as you’re exiting. But that’s what you’ll have to figure out for your specific device. That’ll be true no matter what you end up installing.
You can do it right now and see what happens. Go to Bazzite.gg and go to the download section. It just wants to know where you’re installing it so it knows what version to give you to download. Installing to a laptop will be a different file than installing to your steamdeck.
And since you shut down nightly you’d always have the most current version when you boot up the next day. But that only applies to atomic (formerly called immutable) distros like Bazzite. If you go Mint, which isn’t atomic/immutable, that won’t be the case and you’ll have to stay on top of updating.
It’s early still, so you have plenty of time to do some research and when you’re ready ask the questions you still don’t understand and generally we’re pretty helpful around here. 😁