>>50076775just pick a game engine (you can try reading about the more popular ones and see which one sounds like it'd suit you more but in the end you'll always get used to your main tool), watch tutorials on how to use it, make your first functional game (even if it's absolute horseshit, just make sure it works and that you did it from scratch), then move on to more advanced stuff like how to achieve certain visual effects, optimization, game design/game feel, etc.
it's fairly time consuming but honestly seeing something come into existence is insanely gratifying.