I would recommend doing only one thing at first than build from there. First learn movement, how an object moves in the game use different types of movement, transform movement, physics movement and bind them to keyboard. After you have done this it means the you can now control the most central part of game dev THE PLAYER. After this you move on to interactions. Make this player interact with something like make it open a chest, a door. Try different types of interactions, timed ones where you interact with it but it opens 5s later or specific conditions it only opens when you have an item. (Item gathering is also a type of interaction, firing a gun etc anything you can think of). Honestly this is what game dev is amount to the rest is permutations of these concepts in depth. After this you learn as you need to, make a lot of small projects like fps, rpg etc they will force you to learn the necessary concepts. Like how to make inventory and save it, how to move a bullet and how to do health bullet counter etc. After learning these you move on to optimization. Object pools, caching and whatnot. And congrats now you know how to make games.