This, or the Tray Icons: Reloaded extension for GNOME, which adds the Steam icon to the tray bar. From there, you can click it and it shows a list of the installed games.
If you are new to Linux, GNOME has quite a different feel from your usual Windows flow. I personally love it and would never swap back.
(Off-topic, but If you would be interested in a gaming-oriented distro, I would recommend Nobara Linux - the official version looks fairly familiar for Windows users and it also comes with a bunch of gaming-related stuff preinstalled like Steam, wine dependencies, mesa drivers for AMD, etc)
It is also helpful to know that if you make any mistakes in you character build, you can respec your class and ability scores very early in the game for a fairly low price. The things that you cannot change are your origin, race or appearance, but these don’t have such a great impact (unless you take the Dark Urge origin and find a bit too bloody for your tastes - in which case you have to start over)
Personally, I never played DND but I did play a bunch of RPGs before (such as the Pathfinder games on PC) and I love checking out character build guides. The learning curve of BG3 was pretty smooth for me.