To play in leagues and earn cash. Grow with a team be #1

I am 18 and play Rainbow Six Siege I am looking to Play Competitive with a team in leagues for cash prizes. I am a flex/support player. I know how and what to callout I am familiar with basic strategies on the usual map pool. I am always trying to improve. I have a mostly free schedule. Currently Plat 3 with a 1.2 kd have year 1 and 2 ops. I can take constructive criticism. Have played since mid velvet shell. I am on Xbox