If you are working in a group, make sure you are running on the same version of GMS and only update when given a fair warning.
They also have comprehensive 3D and shader introduction videos.
Highly recommended to check out the full playlist if you're a complete beginner. A comprehensive introduction to basic features of the IDE. Beginner GameMaker Tutorials - Tutorials from Shaun Spalding.GameMaker is a user-friendly, cross-platform game engine by YoYo Games that allows both beginner and advanced game developers to create 2D and 3D games for desktop, HTML5, and console platforms.
A curated list of awesome libraries, snippets, guides, and projects for GameMaker.