*slow clap* Everything that Fanag said is spot on.
My friends and I made our own forum to continue our in-person games online. We all work together but very quickly learned that getting everyone in one spot can be difficult with many having families and kids. What we did was set up a game out of one of the books (Princes of the Apocalypse) and created our characters using 5e rules which are simplified compared to others. Some of my buddies who are first time players even used pre made characters and changed them up a little, made a new background, stuff like that and then we slowly coached them on how to make their own. Now that we've been playing for about 3 or 4 months we've slowly switched from strictly 5e to a custom 3.5e/pathfinder rule set. 5e is VERY simplified (hence the hate in veteran circles) and 3.5e and pathfinder are really in depth as far as character leveling, feats, abilities and things like that.
Basically, the difficulty is finding a steady group to play with. If you can get that, it's super easy from there. Get a rule book, a DM book, and maybe a monster manual and it outlines everything that you need for any adventure you can think of. We started with an adventure book since many of us were newbs and it's made life easier when we've had to switch DM's for any reason (vacations, time constraints etc) and it gives you a storyline to follow and various scenarios to play through.
I would totally advise getting into D&D though, it's fun, exciting and you can definitely get lost in your game.