Where does one being to learn how to manage software licenses in AMS?
I hope that (https://www-secure.symantec.com/connect/videos/managing-software-licenses-video)video will help you in understanding how to manage software license.
Chapter 10 of the Asset Management Suite User Guide
A great resource is this new Software Management Group on Connect:
I recommend joining the Group and posting your question there.
Also, here's a video on License Management that might be useful