There are lots of ways to play Dungeons and Dragons (or other table top role playing games) online. With Roll 20, or Fantasy Grounds, or many of the other dedicated services out there. (If you have a favourite, please leave a comment!)
When I was 14 years old, I ran a weekly D&D game with my friends and had to come up with stories--sometimes on the fly. The purpose of D&D is that you have a storyteller, known as the Dungeon Master, who narrates the story to the players. This includes the setting, plot, and non-essential characters. The players are the ones who tell the Dungeon Master what the essential characters do--and as any writer knows, your characters can often screw up your intentions for the plot.
I'm not sure what connection this has to my dreams about Conan, except that Dungeons and Dragons is a place I go to once a week where I am surrounded by friends who make me smile and help me forget for a bit the world that weighs on me.