The communities forum is a huge resource like the previous people have suggested and I highly recommend it as well.
UEM has about 36 videos in this playlist on VMware's youtube channel that are good to get you started:
VMware User Environment Manager 9.2 Overview - YouTube
UEM in 60 minutes is very dated but good reference point for getting started:
VMware User Environment Manager Deployed in 60 Minutes or Less | VMware End-User Computing Blog
When your looking for more detail the documentation pages are great:
VMware User Environment Manager Documentation
The documentation section in the UEM communities forum here is also a great place to get started as there are many recipes people have been working on that you can get good information. Just click documents and you can browse 100s of recipes.