How much PHP should I learn before using CI.

[eluser]XeOuRuX[/eluser]
HI, This is is my first post. I want to use CI but I am confused about few things. I am not sure whether I should learn more PHP before using CI. It would be very helpful if you guys suggest me on this matter.My current situation is..........

1.Basic understanding of PHP
2.Done some local development
3.Have not used PEAR or PECL yet.
4.Clear understanding of OOP
5.Clear understanding of MVC.