1)Go to this link: http://signup.leagueoflegends.com/?ref=4f9a767b620e3642078004 and make a new account!
2)Go to the game and start playing some matches until you reach level 10!
3)Once you are level 10, quit the game and re-log
4)Send an email to this email: [email protected] with a screenshot that you are level 10 and your summoner name!
5)You will get your RP reward in a few hours.