Instead of learning skills individually, learn them as you go! Just pick an engine - I'd recommend Godot - and get to work.
Here's a nice challange about building increasingly difficult games: The 20 games challange.
You start with Pong, which is super easy to get the hang of. You could even follow a tutorial for that one and then try to use less and less tutorials as you go down the list.
Just get going instead of watching endless how-to videos, which is an easy trap for beginners. Actually starting a project and finishing one are two of the most important skills. You'll quickly learn which parts come naturally to you and which ones you need to focus on.
As for creativity, once you're done with each game, try to think of a twist to spice it up and add it to the game. It can be a simple thing, like e.g. with Pong using multiple balls or maybe adding obstacles - just test what's fun and what's not!
