Click here for My YouTube Playlist on Sketch Notes and Tips and Tricks
The Sketchnote Handbook - a great reference
Rohde, Mike. The sketchnote handbook. Pearson Education, 2012.
I have found this to be a great resource! He has step-by-step instructions as well as ways to practice, which for me, a "non-artist" is great!
Sketch50 - https://sketch50.org/