Just make games, that is really it.
Try to keep it fun for yourself to do development, if the fun dies, so will your game dev dreams.
Don't overcomplicate things by trying to make a project that is way too ambitious and large. Shoot for something small first, keep making small projects until it is becoming easy to manage.
I personally always recommend starting with incremental games (like Cookie Clicker), but those are also my favorite games to work on to begin with. Something like Flappy Bird, or Frogger are also great ideas for small-scoped games that you can actually make as a beginner!
If you look through my profile, almost everything I've uploaded here has less than 40 hours of development time invested in it. You can make small games and pump them out fast while you learn! My game: Knifepoint (Prologue) by Frontline Studios is the most time I've spent on a project, and I think that is only about 30 hours, and most of that was reworking systems I had already implemented.
The easiest way to get good at making games, is to just make games!
Good luck, friend!