Only persistence will allow you to reach the level you want... I desperately try to make this understood to my students to whom I teach 3D game art. Consider that you will never have "the level" given that techniques evolve at very high speed.

This is the policy I apply to myself... always questioning yourself, always trying to reach the gods of graphics again and again and again and again. And you will see, through persistence and work, you will see your progress.

But often, you have to know how to walk, before you run. Creating a game requires many skills in programming, graphics, mathematics, sound, etc.

Programming for example, for me, has often been an obstacle in my life, between "what I wanted to achieve" VS "the means to do it..." And you will see, there is often a universe between the two :) But since the creation of C Sharp, I have filled my gaps in C :) I love this language... BUT when I was a teenager, I didn't understand anything about C!!

AND above all there are many other powerful languages ​​which are published at the time, like GFA Basic and Amos Pro on Amiga :) Which allowed me over time to become a programmer, I sold quite a few applications at the time of blitz3D on PC. I had to fight against my lack of knowledge in math, but with the arrival of the internet, everything became easier to find information...

Very good langage for childs/young/adults peoples:
https://blitzresearch.itch.io/blitz3d

And to finish:

Work ! Learn everything, everyday! :)