First of all, it's so great that you have a desire to get better. That alone puts you ahead of most people. So, how do you actually get better? Take an inventor

First of all, it's so great that you have a desire to get better. That alone puts you ahead of most people. So, how do you actually get better? Take an inventory of your weaknesses. Now eliminate them, one by one. Next, start building stuff in your spare time. Read code on github, fork repos, create your own. A lot of what you make won't be good, but keep at it. Over time the projects that you keep working on will improve, your weaknesses will be eliminated, and you'll be doing side projects that stretch you. If you keep at it you'll be great at whatever you set out to be great at.