I've got the urge to GM an online RPG game and you guys are invited

[Voltaire 4,624]

I have never played D&D before and would be clueless. I just watched a Roll20 YouTube vid to get an idea what it's about. Out of curiosity, do the game board environments come pre loaded on the site or do you as master need to create them yourself? Also, it's like Skype during the game play?

You have to load it or make it. Hopefully something useful can be found online.