heres the easyest way to learn ive done it before. choose what artworks you like best (up to 2-3 diff types) and start tracing and copying them. your body will start to get use to it after a year or so. and then put all the styles together in one drawing and start picking out diff parts that dont go well with each other and then you just formed your own style
my style is a combination of Ken akamatsu and king cheetahs, and also yugi shimomura.
Kuryu, do you know of DeviantART? If you don't, then consider checking it out / making an account and posting your stuff.
As for critique, I'd have to say that you could spend a little more time on your drawings. You do a good job with the general balance of your pictures and the poses are pretty decent. Try shading some of your art, perhaps?
1 yes i do have my own account on Deviant Art(i go under the name Kuryu)
2 when it comes down to inking i just cant make the lines not bumby
3 i was kind of in a rush when i was making this. it was for a comic called porn-dexters
4 no this is not ms paint, i used sakura micron pens