Speaking of level 30, you have to play up to level 30 in order to get full League rights, including taking part in competitive play (ranked). League of Legend’s professional eSports scene uses the draft pick system in tournaments. You will be unable to play ranked until you reach level 30. The 'Ranked' mode follows the same ban pick method as draft pick, but for competitive play and ranking in the league.
Both teams see each other’s champion picks once they are locked in. Bans should be strategic in order to have an edge at the start of the game. In 'Draft Pick', both teams select a champ each to ban from the game, making ten in total. Players simply choose champs at same time, with each team unable to see each other’s choices until the loading screen. Also, bear in mind that the number of rune slots available will increase as you climb up to level 30. These are selected when you choose your champ. In the image above, you'll see runes that you need in order to help your champ on the battlefield as they aid your stats and abilities.