You've chosen an immutable distro based on rpm-ostree. If you want to install a program/application/app then flatpak is the way.
Heroic Launcher works great for installing GOG/Epic games but if you want to install a game or other program from an offline installer then I still fall back to Lutris.

For more in-depth read up on rpm-ostree and flatpak

The best tip I can give you is to get rid of windows, and, well, you've already done that :)

Use alternativeto.net .... not necessarily for just Windows programs alternatives; but it is also great for looking at popular utilities for any task in Linux.

Some programs I use a lot were not suggested anywhere else (e.g. Pluma as a basic text editor and Pinta for basic image editing).

So, this one is a bit controversial but, when something doesn't work try running it from terminal.

Unlike windows, Linux doesn't tend to do "pop up errors". Running in terminal gives these alerts, and can often give you a hint as to why it isn't working - be it a missing library, a permission error, or something internal you can quickly search. Usually, someone has a fix!

A lot of games are going to work without you having to do anything and some will need some tinkering. In that case, https://www.protondb.com/ will be your best friend, telling you exactly what you need to do to get things running.

That being said, some games simply can't be run under Linux. They might work in the future as compatibility improves but some won't. If it's an issue for you, you might want to dual boot windows as a workaround.

ONE OF US ! ONE OF US !

is this your production machine? If yes, dont type random commands until you know exactly what they are.

I know it's Linux and you can try many things as you want, but unless you are very experienced, dont do it on your main laptop.

It is pretty difficult because you can do things like installing new enviroments or try out different hacks for free. If you really want to tinker, do it on a 2nd laptop or just in Virtual Machine.

My best advice is:

You should never blindly copy and paste commands form the Internet into your terminal.

Execute "ujust" and marvel at what's possible right out of the box. If you used KDE check out some simple tips on how to configure cool windows effects. A little wobble makes all the difference. Browse the apps you can install, there are some pretty neat things in there you probably never heard of before.

And don't forget: once you got the things you want working, let the system fade into the background. No need to constantly tinker with your distribution unless you enjoy it.

+1 for Bazzite! I converted last year, and have never had to go back. My tip would be to make good use of ProtonUp-QT that should have come with Bazzite by default. Use it to get Proton GE which in my experience has been the best compatibility layer for Steam games. You can also batch update with that tool so that when a new version of GE comes out, you can set games en masse to the new version.

Nice! I recently tried KDE Plasma and I’ve been really impressed not just with the polish but with the look and feel that still kind of reminds me of Windows without being Windows.

Mess around until it breaks. It's fun.
Also checkout "ricing linux." (There is a unixporn community here that can help you)

Welcome in from the cold. We have hot cocoa and blankets.

I did the same a few months ago. Installed bazzite just like you. Then installed fedora 42 workstation over it one week later.

While it's designed to be plug and play, I found bazzite frustrating. But then again, I'm a Linux vet and I'm a tinkerer. I like to customise system configuration files. Immutable distros just weren't for me.

But if you're happy then that's all that matters. Happy gaming!

Obligatory fastfetch is right there post

learn how to configure your shell now it will save you so much time and make it easier to learn if everything is already tailored to you just find documentation on your shells configuration its usually in ~/.zshrc or ~/.bashrc

Less a specific linux tip but look into Ventoy, it can carry multiple bootable ISOs and its just useful (reduces the amount of ISO Sticks to 1)