Musistic is a platform agnostic collaboration platform and they have started Musisitc University, a site with tutorials and articles on a range of different DAWs.

You can also subscribe to their YouTube channel or catch new videos on their blog each week.

For Pro Tools here are a sample of what they are offering right now...

• Musistic University: Widen Effect Using Pitch II
• Musistic University: Pro Tools Track Types
• Musistic University: Adding sub-kick to your mix

They also have a section on how to Send & Receive Audio in Any DAW with Musistic covering Ableton Live, Logic Pro X, Pro Tools, Studio One, Bitwig Studio, Mulab, Reaper, and Traction.