I'm pretty sure you won't make a fool of yourself if you join one that's welcome to new players. Just make sure you read up on the rules and watch a few playthroughs beforehand on youtube, that's all anyone can really ask of a new player. But as for shadowrun, well, good luck with that. I find people will join if you GM something, but if you're only willing to play, then you have no chance of getting a game unless it's D&D or Pathfinder. My advice (Tyler): change to Pathfinder or set up your own Shadowrun game with you as the GM.