Welcome aboard @Thraeg!
The things you really need to know come into play once you start hooking up to PC, or shopping for games outside of the headset (on the Oculus website for example). There, be aware that Quest store sells the apps that run natively on Quest, and Rift store sells the apps that run natively on PC. Some games give you both versions, called ‘cross-buy’. Once hooking to PC, you can of course also buy VR games on Steam/Humble/etc.
One other thing worth doing is checking the ‘experimental features’ in Quest settings. A few cool things to play with there, like enabling 120hz mode, setting up a virtual couch, and turning on ‘stationary boundary pass-through’. Updates are pretty frequent and automatic, but you can check under ‘settings/about’.
Other than that, check the thread, buy some games, and let us know your Oculus name so you can hook up to all the friends in this thread - fresh meat for the score challenges! ;)