For the new players, join us in channel 2p2, there is usually a bunch of us idling there and at least a few of us (not me) have low level smurfs that we can play with you.
If you like watching streams I recommend watching:
TheOddOne - Think of him as a Destiny that is actually good (plays for NA's #1 team), hugely entertaining, will often explain his thought process, will teach about jungling (a difficult concept for newcomers to MOBA's).
Scarra - My comparison to an SC2 stream would be Axslav, as he'll explain his thought process regularly, often with deep insight. Plays mid for team Dignitas, one of the top NA teams
Aphromoo - Was introduced at the NA regional finals as the 'human highlight reel' which is apt. Exceedingly talented and stupidly entertaining, he's an AD carry for the up and coming Mme Ferus team.
There's actually tons of good streams, anyone that plays for CLG, Curse, or TSM will have a popular stream that is worth following, you can find these generally at solomid.net/streams