Apple Logic Pro /LogicExpress Discussion

When I started learning Logic a few months ago, with plenty of musical  
knowledge but no prior knowledge of engineering, I couldn't have  
imagined how much there was to learn. One thing that I'm sure would  
help to piece together all the things I am learning is if there were  
sample projects available on the net. For instance, I'd love to learn  
how to make a realistic bass track using keyboard/sequencer as I don't  
play guitar. My own attempts sound feeble and I am obviously missing  
loads of tricks. Its easy to find loops, but that doesn't help at all  
when it comes to creating tracks from software instruments.

Are there any commercial sites or forums where you can download  
finished projects?

As always, thanks for any replies

Andy B