I found it difficult to learn at first, as although the basics are fairly simple, it was different to what I was used to doing.
I’ve posted some videos here by other instructors and then later, more importantly by Eddie himself to help you break it down, use it to transition, submit your opponents and move to dominant positions.
His book is available from Amazon, as shown here:
This first video by Submissions 101 explains the basic rubber guard positions and their names.
In this video by Ripsaw defence , you can watch Eddie Bravo doing a seminar in Newcastle England where he breaks down the rubber guard.