New to eBikes - where to start?

Hey everyone!

Just picked up my first eBike, an Engwe Engine Pro, and I'm super excited to join the community! I've been eyeing these for a while and finally pulled the trigger. For those of you who've been riding Engwes for a bit, what are some of the absolute must-have accessories or first upgrades you'd recommend for a newbie like me? I'm planning mostly city commutes and some light trail riding, maybe 10-15 miles a day. Any tips on maintenance or general riding advice would be awesome too!