We're still hard at work at creating more videos that explain how to get started with Lansweeper and scan your devices.
At the moment, if you're just starting to use Lansweeper I'd recommend the following:
Basic installation: https://www.youtube.com/watch?v=lG-aW68iHm8
Advanced installation: https://www.youtube.com/watch?v=A760zLCLyn0
Software Demo playlist: https://www.youtube.com/watch?v=CABp7Qh3JhA&list=PL-MlsB87IqF8E7nloJGcwPT6f0yD2YlG_
We don't really have specific training documentation. However, most features do have their own knowledge base article which explains how to use them. You can find them here: https://www.lansweeper.com/kb/
If you have anything specific you are looking for, or a specific problem you are trying to solve, I can see if I can get you something more precise.