I would start with Marketo University, there are a lot of useful things there, many of the free. But this will take an access to an instance, AFAIK.
I have resources for that exact case on my site: marketingrockstarguides.com.
Agree that Marketo University + Joe Reitz's Marketo-Fu + Josh Hill's Marketing Rockstar Guides are a good start. However, she's going to do best with access to an instance so she can create test programs. Best to learn by doing!
This infographic is super helpful for anyone changing platforms: https://hub.uberflip.com/blog/marketing-automation-glossary (although Marketo recently changed "Lead" to "Person")