Welcome to the forums :)
There are enough changes to the interface and some of the basics (e.g. how to create tracks) in Logic 8 that I would advise you to start with the beginner level tutorial for logic 8.
There is a switcher guide (free) which I'd recommend watching first if you like. It;s designed to be for people switching from Garageband to Logic, but is very useful as a basic primer to L8.
The Core Logic 8: Logic 101 tutorial is a great beginner level tutorial IMHO.
The first section deals with waveforms and sound but also includes some useful tips on how to get around Logic... it all becomes logical ;)
Let us know how you get on or if you have any other questions.