sir ,let me say that your art its quite inspiring, it makes me want to become a better artist and sharp my skills(no pixel artist is complete without good skills in digital art ) yeah I think IŽll sprite her .
Sure thing! The best advice I can give is to draw ALL THE TIME! Also, don't be shy about using reference of artists you like. I know this sounds obvious, but many people don't work at getting the basics right, and to do this, there is no better teacher than the artists who have done it before. Naturally, look up someone who has a style you love, and what you are aiming at. Practice is everything!
I recomment looking up lineart by Phil Foglio and Bruce Timm. Also Harvey Kurtzman and Ron Smith. These guys are amazing cartoonists of varying styles, and their black and white stuff is priceless for study. "How to draw comics the Marvel way", I recommend getting this book from amazon, as it is pure gold. It has tons of tutorials on faces, poses, bodies...No comic artist should be without it...
As for digital art...There are a million areas to talk of and I am not sure what you need. All I will say is this, to do good digital effects or colours, make sure your inked art for scanning is cleanly defined, with no pencil marks or smudges. When using a scanner, scan the art as 300DPI "black line" not "colour" or "halftone". That way you will get nice sharp lines to work with. Also, use layers (if you are using Photoshop). Always have your lines and colours on separate layers. That way you can divide colour, inks and tones into different areas. Again, study the work of other artists who digitally work. And by the way, if you don't already have a tablet, get one! They are essential for digi-artworking...!
I could go on but, this sort of covers the basics... Let me know if you want advice on a specific area. But my advice to you at this moment is to DRAW DRAW DRAW! Keep the practice up and take it to the next level!