Looks good, I would though say maybe break the certs down a wee bit more. Game making and Godot is a huge field so I think I would break it down into
Godot level I - either 2d or 3d only or both.
Very basic game design principles, game doc, theme,synopsis, etc
installation,
project creation and handling
editor layout and usage,
github usage,
scenes, nodes, singletons,
node pathways, variables, classes, functions, and constants, basic mathematical usage, assignments and comparisons
asset management, understanding asset file types strengths and weaknesses, asset and file loading, reading / writing saving,
gdscript formatting, naming, organization and coding practices,
checks, loops, arrays, dictionaries, matches
node transforms, movements, scaling, rotations, vector2 and vector3 understanding
Collisions and node signals
Creating gui, 2d textures, menus, sounds, and fx
Creating 3d shapes with materials and textures.
Importing 3d objs and scenes with materials and textures
Optional: 2d and 3d asset creation
Creating animation in Godot and importing animations in godot
creating basic games in 2d: Pong, Creeps, Creeps with shooter, Rpg, Racing (with path2ds), Memory card game, Match 3, notepad clone
creating basic games in 3d: room render, ball in maze, fps, modular character, dialog and 2d gui in 3d games
I think if a person learned all these aspects that would have a elementary level understanding of Godot.