If you don't mind some additional advice. I'm a self taught traditional artist, noticed your work is also traditional, which is great, builds a strong foundation for any form of art, be it painting, digital, or sculpting. Some methods I have used over the last 3 years, while I'm still mastering my skills and have plenty to improve on, I suggest picking up the book "Classic Human Anatomy" by Valerie L. Winslow. It was made to help improve your gesture and form drawing. In addition, collect a huge bank of reference photos, from real life, to other artists, re-draw them, and try to recreate there work with your own techniques. and just keep working at that, eventually, everything you drew will become natural when designing your own original work. I went from drawing characters crappier then a cartoon, to making life like character designs. as Khaos said, its all about time and allowing your skills to evolve with each new piece of work. 

examples of reference photos, I would pull up fur pelts, belts, different metals, and hair styles, skin color, and just go to town in my sketch book. It can be a long, but very rewarding process. everyone is capable of becoming a great artist, just have to keep hard at work at it, and all ways challenge yourself, even if it comes out horrible, its better to stretch past your boundaries then to stay in a comfortable zone where you restrict your abilities to learn further.

hope any of what I said can be of help to you on your road of becoming a better artist