In this live stream, Sergei will introduce you to the basics of scripting/coding in After Effects using Adobe ExtendScript Toolkit.
LINKS:
Learn Expressions: https://ukramedia.com/expressions
ExtendScript Tooolkit Download: https://helpx.adobe.com/download-install/kb/creative-cloud-apps-download.html
JavaScript Info: https://www.w3schools.com
After Effects Scripting Guide: http://docs.aenhancers.com
Recommended YouTube Channel for extendScript: https://www.youtube.com/peregrinecommando99