Honestly, the best way to improve your comic is by doing what you're already doing -- making your comic.
Draw consistently. Put yourself on a schedule that requires you to draw even when you don't feel like drawing. It's only by doing that you'll train your hand!
Study real life anatomy, even if you don't think your style requires it. The more you understand about how things work realistically, the better your art will be.
Read and study tutorials -- you can find tons of tutorials at places like DeviantArt and Tumblr now days. Learn about things you don't think you need and keep pushing yourself and experimenting. Understand how light and shadow and depth work.
Find artists who have styles that speak to you and study what they do. Some artists live stream or provide tutorials, which are both great ways to pick up tips and learn how someone does what you like so much. Sometimes it's a very simple technique that you might not have thought of!
Don't give up. Your style will change over time in ways you don't always perceive at first. But it WILL change and it WILL get better.
As for my example -- you can check out my webcomic, Wayrift. It'll be 12 years old next week, so the archives show a TON of change from the first page to the newest stuff. Here's book 1: http://tapastic.com/series/Wayrift-Book-1 to compare to book 2: http://tapastic.com/series/Wayrift
Keep at it!