Why not try it now?
While diving in and just plain using OverDrive yourself to request, borrow, read, and return items is probably the best way to learn it, there are free webcasts available that can help to introduce you to it and/or Libby:
There are several tabs for different subjects — some are upcoming live webcasts, but most are recorded and can be viewed at any time. The webcasts generally range from 10 to 30 minutes.
If you’re new to OverDrive, you can safely skip anything about Marketplace — it’s basically the store where libraries (or consortia) purchase titles for patrons to borrow.
Christy @ McKeesport