these are great assets thanks

dont know about map making, but if you want to create your own game (you said map making / gamemaking) then you should use popular game engine.

There are many free tutorials so you will be fine, you just need to know how to use Google and know english, which you do, at least the latter.

Popular game engines are Unreal engine, cryengine, unity, game maker and godot. Godot and unity are my favorite but godot is only for programming pros, and its less developed than unity.

If you choose unity then this is a good tutorial made especially for beginners who want to create their first game

PS I made my first game in game maker but now i consider it too limited