Arch would be a bad idea, as if a user finds installing Fedora too hard Arch ain’t doing them any favors.

And there are guides. Youtube “how to install (linux distro),” if it’s popular there’s already 500 guides.

As for data loss this should come as no surprise: back it up. Preferably on an external hdd/ssd, or your choice of cloud service if you’re one of those people. Erasing your entire hard drive and installing a new OS will perhaps unsurprisingly wipe all your data without a backup. Frankly you should already have backups, idk why people pretend data loss is impossible on windows but it has happened to me and I can’t be the only one.