You should get in touch with your local Rugby League club or maybe join one at your school. Being able to interact with your Rugby League community should get you good opportunities in meeting good coaches and joining teams. Skills don't develop any better then putting them up against other players of the game, and a good coach should be able to give the proper guidance too.
To be a stand-off in Rugby league you need to be able to tackle. If you can't tackle you won't get picked. In League you don't have a back row to hide behind like a Union stand-off does. If you don't make your tackles the other players won't want you in the side.
