I really quick way for me was chatting on coinchat, it was fun and you could learn quite a lot in a short period of time.
Coinchat is dead IMO now, TF (the owner) scamming and running away.
I suggest you browse though topics of this forum, and it a question pops in your mind, don't be shy to post it here; it'll get answered usually within a few minutes.
Perhaps also skim though the official bitcoin website
http://bitcoin.org/