I don't think you need to look any further. I recommend learning by doing! Probably one of the best ways to really get into ArcGIS is by signing up for one of the free MOOCs and doing the work. https://www.esri.com/training/mooc/
Isaac,
You are looking in all the "right" places. Since ArcMap is heading toward the end of its life, there are fewer courses and resources created or updated that focus on that desktop software.
This MOOC from Pace University starts in August and uses ArcMap.
Adena