Alright, so a few core questions here: What day/times? Timezone? Do you have a full group already or no? What is the experience level of the players? What style of game are you most interested in? Are you wanting to use face cams or audio or just text? Have you used roll20 before or is this your first roll20 game? You mentioned streaming, what would be the platform and system? What is the community like? Are you running the stream or is that expected of the DM? Which edition of D&D do you want to play? Do you have any feelings regarding homebrewery or house rules?