Understandable, there's a lot of folks just trying out Roll20, what with everything going on. I assume you're just planning to have character sheet and dice rolling in Roll20 itself? (In my experience, DMs new to Roll20 run into a lot of trouble with pulling up the right map, losing tokens on other layers, and so on. Once they have some more experience, those things can be very fun and useful additions, but starting out they're a gamble.)