Also, what options are available on the backend? Will the buyer be asked for a billing address? Can I turn this off? Can they be asked for a shipping address? What happens when someone buys something? Do they get an email? Do I get an email?

I'd consider answering these questions either as documentation that goes through all of the options available on the backend and/or as a walkthrough of the complete process from signing up to getting an order. A demo Trolley account that's set up with a Stripe test key wouldn't be a bad idea either.