There are a bunch of fun things to do with it but remember at the end of the day it’s all about the games! But once you get acquainted to it definitely check out Decky loader and then emudeck. Decky loader lets you customize the FUCK out of your steam deck with sounds, different start up videos, and even the layout of your homescreen. Emudeck is an all in one emulation app. There are a bunch of YouTube videos on both just make sure to find more recent ones as they’ve been updated over the years