Roland Kahlenberg
Adobe After Effects - Curated Expressions Tutorials
Expressions Tutorials - curated to prepare you for my upcoming Advanced Adobe After Effects courses on Developing Adaptive & Responsive Motion Graphics Toolkits & MoGraph Design Systems.

https://www.broadcastgems.com/prerequisiteadvancedaftereffectscourses
These are great tutorials from Animoplex, aka Parker Young. I've created a shortlist of the tutorials and grouped them into Sections -
Section 1 (Introduction)
Section 2 (Basic)
Section 3 (Intermediate)