I managed to score a closed box GoTrax Transit for half the retail price so I’m wondering what else I should get for it.
What’s a good bike lock so I don’t have to worry about it getting stolen? Are those U locks still easily pickable with a pen? Any cheap options out there for a rear rack and saddle bags? Lights? idk, what do I need so that I can keep it maintained? I’m on a tight budget so I’m looking for the best deals that I can get by with. I want to be able to use it get groceries and run local errands.
Also, do you take your batteries inside stores with you? I saw a lot of bikes on facebook marketplace with their batteries missing because they were supposedly stolen. Makes me think I should make a custom bag for it so I can carry mine around.
I do wish I had gotten one earlier, it’s a lot of fun. A little too much fun. I worry this is going to unlock a yearning for a motorcycle. 
Get a good bell
You’re moving quickly and quietly through neighborhood streets and paths (you should moderate your speed as necessary of course), and you don’t want to startle people by suddenly appearing behind them. That’s the kind of thing that will get ebikes banned in your local area, and plus it adds neighborhood charm when you use it.