New to eBikes - where to start?

Subject: New Aventon Aventure.2 owner - Where do I even begin?

Hey everyone! Just picked up my new Aventon Aventure.2 this past weekend and I'm super stoked to finally join the eBike world. I'm planning mostly paved paths and some light gravel trails, maybe 10-15 miles per ride to start. What are your absolute must-have accessories or first modifications for a new Aventon owner? I'm feeling a bit overwhelmed with all the options out there!