:welcome: to the Droid Forums. Well, the first thing you need to learn is forget everything that pertains to Blackberry. This is a whole new ball game.
I suggest you start with our FAQ's section, and then find a topic in a thread you like and dive into it.
Welcome! Glad you are here. After you read the many threads I'm sure you'll have questions. The great thing about this forum is that someone will be very glad to respond.