I would add, actually. If you plan to stay on SG for a long time, then play the games you win, and don't try to win all sorts of unknown garbage. There are some good groups with much higher odds of winning that will be watching to see if you're playing something you'll win or just filling the library for the heck of it.
Check their rules and start to join them little by little:
www.steamgifts.com
www.steamgifts.com
www.steamgifts.com
this group is still a little early for you, but don't forget about it in any case in the near future:
www.steamgifts.com
Dump your shady keys here:
www.steamgifts.com
www.steamgifts.com