I know you say you have trouble with computer colouring, but I really reccommend learning how to do it. I don't like anime styles (which yours appears to be), but I can tell you've got some good line art going there and seem to be quite accomplished in your style of drawing.
My advice to you is to learn how to digitally render your drawings. Without colour, your work is going to be too easily overlooked and lumped in with all the other "work in progress" line art sketchy type anime drawings. It's way too easy to dismiss it as just more manga scribblings as it is now. There are plenty of anime and manga artists out there who produce what you're doing now, and many more who take it to the next level with colour and other design elements.
You've already got the line art stage down. I think you could turn these into really stunning anime style images if you learned how to work the colours.
Look around on DA for some tutorials, or just use google. There's plenty out there that teach you how to use photoshop itself, and other helpful tutorials that cover lighting and colour theory etc.
I'm an avid collector of tutorials and anything that I think will be helpful for my improvement, so if you need a place to start, check out my favourites on DA. I've got a special collection of tutorials and step by step works. You might find something that helps you out there too.
http://www.lancerey.deviantart.com/favourites/#Tutorials
