I've played 3.5 and Pathfinder a bit in the past without truly understanding what was happening. I've recently started DMing 5e for friends, which aside from discovering how difficult it is to come up with entertaining content, has been going swimmingly.
Although I've never used roll20 before, I am excited for the chance to role-play and fight my way through 5e as a player for the first time, hopefully alongside an entertaining and relaxed group.