New to eBikes - where to start?

Hey everyone!

Just joined the forum and super excited to finally dive into the eBike world. I've been eyeing an Aventon Pace 500.3 for a while, mostly for commuting 10-15 miles round trip on paved roads with a few gentle hills, and maybe some weekend leisure rides. For those of you who've been riding Aventons for a bit, what's one piece of advice you wish you knew when you first started out, especially regarding maintenance or accessories? Any "must-have" items for a new owner? Thanks in advance!