Godot - Gridmaps and Tilemaps
Some videos dedicated to teaching the task of working with TileMaps and GridMaps. DISCLAIMER: I hardly use GridMaps anymore. I have recently found out about Qodot and Trenchbroom, and that is amazing. Here is the link to Qodot here:
github.com/Shfty/qodot-plugin
I do however love TileMaps still and always use them on 2D projects.