Here are some of the basics of music theory, this is specifically looking at note and rest values (how long they last). There is a link at the bottom of this post to the Rhythm Trainer where you can test your new found learnings..
Click here for the Rhythm Trainer where you can create your own rhythm tests to check your understanding.
Once you have mastered creating your first grooves in Garageband you will soon be looking to add drum fills to your projects to add variety and to mark out section changes. Below is a great introductory video in how to create drum fills from a drummer’s perspective. You can then use the same fills in your garageband projects.
The sheet music is below with a view of how these fills might look in your garageband projects:
Needless to say, this is just the beginning…there are some inspiring examples here..
Ouch, now that’s funky..