It's actually pretty good for your first.
Get rid of the vignette, the dark is too dark and the entire thing is just too saturated.
You don't really have alot of velo, you try and avoid editing the gunclip by just cutting in on the shot, which looks really fucking bad
Look into getting twixtor to avoid the bad frames
That whoosh thing into the death cine was disgusting
I won't go too in on details but i suggest you work on these first