"Anti-FirstTime" mechanism. Call it whatever you want.

Hey, Riot! You should change the game a little bit. It would be great if you make it to NOT be able for the players to play any champion for first time in a PvP battle. Like.. The players should be limited to play like 10 minutes of practice (without being afk) with the champion they want to play in PvP battles. That would be great. Thanks! Sorry if I wrote something wrong, I do not main English ;d