Here is a direct link to the PAM study guide (it's embedded in the cert landing page that Christo provided), which outlines an approach and provides some sample questions
And here is the direct link to the LMS courses outlined in the learning path (also embedded in the cert info page)
Learning Paths
Note: I'd suggest searching in LMS with the course code instead of clicking on the link to the course in the learning path doc... if you click on the link it takes you to an external page that presents you with a cost associated with the course.
In addition, download the PAM appliance and set up a personal lab environment either on your own VM or request a demo on demand instance. I would suggest setting up a cluster of at least 2 appliances to understand the multi-site synch setup options.
Good luck!