I Started April 2022! I never played a game before, Never DMed a game before but I watched a WHOLE lot of CR and D20. Literally one of the main reason I became a GM is Fantasy High, ANYWAY here's what I've learned. Read the Players Handbook and DM guide. These will be where DMs get the wealth of their knowledge, then you google the rest. Buy a Short Campaign or One Shot They come with everything you need to start a game, and many come with helpful GM tips. The Free Community is Nice People want to play, and they need GMs, they don't expect you to be Matt Mercer and honestly if you just straight up make a game and say " I'm a new GM learning the ropes" you'll still have a packed house. You will have Flakes the big difference in free vs play is some characters will just never come back to a free game ever again. I dont consider it a bad thing, find new players, try and make it work , if it doesn't well take the lessons and learn Play with Vets People in the community have no problem talking and teaching. If you host a game and get 1 or 2 vets, it's a lot smoother on everyone and normally they'll share the wealth of knowledge they have. Have a good Headset your job is a lot of talking, you'll want them to hear you. It's alright to be Overwhelmed Not only are you responsible for the game, but also for Roll20. Learning how to handle images, sheets, characters, levels, music, tokens, Mods(Apis). I recommend watching roll20 tutorial videos and getting comfortable different things like How to make music, How to control NPCs and Combat.