I’m just getting started with Godot and looking for a beginner-friendly roadmap or starting guide, especially for someone new to game engines.
I’d also love to know if there are any ready-made 2D or 3D demo projects that I can download and test, to explore gameplay flow, scenes, scripts, and visuals.
If you want to check game samples in that repository, check the 3d/platformer, 3d/truck_town and 2d/platformer demos in priority. Most other demos have a smaller scope and focus on showcasing how to use specific features of the engine.
These two tutorials in the documentation orient you to the Godot editor as well as the basics of making games, which will help a lot when looking at the repos the others gave you.