I learnt by playing. The only thing you need to learn truely is how to wire up units by using the tab key, and have a general understanding what gets wired to what. The reason help file has a huge ammount of information about practical uses of all the modules, so refer to it when you want to get a bit deeper. Apart from that, pick apart the demo songs.
last thing i wana say should i get a midi keyboard because i see i cant play my keyboard like fruity loops.