Hmmm… I’d say the best thing to do is read over the players manual, as well as a few fantasy novels, get an idea of what you’d like to play as a character, if your going to play via roll20, find a beginner friendly game that fits your schedule and join the game. or ask if there’s a game master who’s willing to allow you to sit in and watch a game session and how it runs. If you have any questions feel free to ask.