Before you begin, we recommend that you check the FAQ . It is short and illustrated with videos. In less than 5 minutes you will be acclimated.
At any time you can see MENU > HELP
The participation in leagues will be removed only in home page. You still linked to the tournaments that you participated in this league. By participating again in a tournament organized by this league, it will be displayed again in your homepage.
GabrielC95