League of Legends - the beginning

I managed to get into the League of Legends beta by finding a key in one of Kotaku's sadistic scavenger hunts. Luckily, it wasn't so sadistic!

Now that I've installed the game, I think I might actually play it, but I guess I have a few worries:

• I've only played DotA a few times, is this going to be way over my head?
• Will I get bored and quit playing before I arrive at a point of understanding the "fun" of the game?
• Will everyone online call me a n00b?

These few questions will probably be answered very quickly, but I'm determined to at least give it a try. I'll write up some of my impressions after a little bit of playing later this week.