First real action drawing

[Helm]

I on the other hand think you shouldn't bother with 'style' whatever it is, it will happen on it's own. What you need is more solid knowledge of how the human body works, less 'mangaish' influence and more more more practise in simpler poses before you try the tricky shots. I can see you used actual hands for reference for this, and that part shows. The walls and background are really nondescript, though. I don't suggest you use tiled bricks so much, because they're actually not all that common.

Take a stroll downtown with papers and pencils on you. Do quick 10 minute studies of the buildings and people and angles and stuff. I guarantee you you'll understand urban environments a lot better after just one trip.

What doesn't work in this most, is the guy's legs. In that perspective shot, you wouldn't be able to see them at all, I think. Furthermore, don't bother shading with the pencil, if you just want to get a middle tone. If you're shading with the pencil, use a proper lightsource and stuff.