In other news, welcome to Buzzerbeater! There are many things to be learned about this game, so I probably can't list them all down. Since you are a new user, being relegation to Division 5 won't be so bad, as you'll learn about how tactics work, as well as how to manage your money. The best place to learn is the game manual
http://www.buzzerbeater.com/community/rules.aspx?nav=Rule..., as well as asking other users here on the forums.
Don't be afraid to ask questions if you don't understand something. And remember, BB is a marathon, not a sprint. Good luck!