Lesson #1 of LoL: DO NOT play with strangers until you have at least a basic understanding of the game's fundamentals. LoL has one of the most toxic communities of any game in history.
I recommend playing with ToJ LoL chapter members as they are usually very helpful and friendly teachers.
Once you have a general feel for the game, then you can play in solo queues if you're brave enough.
I only play LoL socially, but I am (more or less) glad I learned to play because the game is immensely popular and free-to-play, which means I can play with anyone in ToJ willing to install the game.
EDIT: Also, be sure to post your summoner name in this thread after you create an account.