I agree with BColbourn, you'd really only be shooting yourself in the foot if you tried to get work at a studio with this animation. I know that's not what you want to hear, and I apologize, but it doesn't seem as though you have much animation experience. You're trying to tackle a more advanced problem, doing a fight scene between two interacting characters. There is alot to consider when you're doing character animation, such as line of action, strong key poses, anticipation, overshoot, snap back, overlap, timing, weight, balance, moving holds... on and on. There are alot of subtleties that seem overwhelming, but are a joy to animate, once you start to understand the basics.
Start with a bouncing ball... and don't just animate a bouncing ball one time and consider yourself schooled. Animate a bouncing ball over and over and over again, in different scenarios until you understand weight, timing, squash/stretch, ease in/out, etc... until the animation looks realistic, or believable. Also, use reference. Make a video of yourself acting out the movements of your characters and try to copy that motion as close as you can, until you understand how the motions work. Then you can build on that with exaggerated poses, timing, etc...
John K's blog is a great resource for learning the fundamental principles of animation, and everything associated with it. Granted, that guy seems to hate all things CG and doesn't hesitate in letting everyone know what his opinion is about it, but there's no denying the man's knowledge. There's alot to be learned from him, just take his fascist 2D slapstick cartoon animation nazi attitude with a grain of salt.

Also, a great book to pick up would be "Animation" by Preston Blair. Here's a link with a few pages from the book: