Your Steam ID is just this part - "STEAM_0:1:25274520." And congrats on playing an M (17+) rated game
Welcome, add the [rct] tag to your name and play in the n00bfest servers so that everyone can get to know you a bit!
There are votes that occur every once in a while (however, don't ask when the next vote is, there's no way to know, and asking will just get you flamed) to decide which [rct]s deserve to be accepted into the community.
Play often on the servers and stay active on the forums and you should be fine (becoming a member has nothing to do with being good). Be patient...it might take a while to be accepted.
If you have any further questions, send me or Rokatanski a PM.