What 3D game genres should I prototype so I can get an incremental learning experience

What 3D game genres should I prototype so I can get an incremental learning experience

For example:

Game 1 introduces player movement and interactions with the world. So a basic soccer game without a goalkeeper (just a net)

Game 2 NPCs. So a basic FPS game where we can pick up guns and shoot at enemies

Game 3 might introduce more realism, so we can have a stealth game. We have to sneak around enemies to collect loot. Enemies have vision cones, and maybe lit up areas are visible outside of the vision cone

Game 4 could take all of the above and create a stealth shooter (I don’t know if this is too big). OR game 4 can take a pivot and create a simple sword fighting game where the only thing we do is attack with our sword and block attacks

Etc

What genre or game idea progression do you recommend so I can learn Unity in an incremental fashion where I am constantly learning new things, learning things at a good pace and without gaps in my knowledge

Thank you so much!!