First off, you do not need to know most of that stuff. Tooling around container-based development is really nice nowadays. It just works almost all the time – and way more often than in mutable setups.
As a beginner you can not really transfer docs from one distribution to another, so you look for docs on your distribution and ask in the official support channels. Those of bazzite are pretty responsive and will be able to help. The community is able to help way better than in a traditional system where every installation is almost but not exactly the same.
Nothing is as bad as accidentally removing some important OS files and not knowing how to restore them. That will just not happen in an immutable setup.
I have installed immutable distros on lots of computers and the users usually are happier than they were on traditional linux: Nothing breaks anymore, the setup is way more solid. Its great for me, too, as I need to support them less often.
Seriously, you should give this a try: Immutable OSes are a huge step forward. Takes a few days to get used to, but I am pretty sure you will not want to go back afterwards.
Immutable distros are the future for everything. We just need to wait a for the people most heavily invested into the status quo to retire.
Any user can delete important OS files by turning their computer off while an upgrade is running in almost all traditional distros:-) Sure, you can disable updates, but that is not an option either.