Here's a basic guide:
http://glb2.warriorgeneral.com/game/forum/thread/5236282If you have any additional questions just shoot me a chat or PM.
Right not most established teams won't have room for you since it's already mid-season, but you can at least put your guy on a CPU team for now and learn the ropes for the rest of this season. Then you can advertise him and try to get him on a sophomore team next season or try to jump on board with one of the many rookie teams that are starting new teams next season. (In order to join a rookie team next season you would need to retire and recreate your player though)