Advice 1: Set up Samsung Pay! And while you're at it, use referral code 00D318 and we both get five buckaroos

Advice 2: Get a case. It helps A LOT with gripping the phone properly.
Advice 3: Try not to hate the case. The phone looks and feels amazing without it, but trrrrrrust me, grip and handling it is sooooo much better with one.
Advice 4: Spend time going through all the settings. Go into every menu. Know what your phone can do and where those options are. For instance, did you know your phone can detect doorbells or kids crying? Yup.