Looks like your doing just fine! but I will suggest using some aperture for the depth of field side of things
otherwise keep doing what your doing, there’s a great vibe to that last shot also like the design 
@HOOKERno1 Thanks man…
Aperture would definitely make some of these pop, great start to your gallery.
Good start, Love the last shot
I’m not an expert, but I’d suggest using slightly less vignette; my logic has always been that if you can see the rounded line the effect causes, you’re using too much. If you use just the right amount you’ll get the darkened picture edges without the noticable line. Hopefully I didn’t word that too badly…
I really do like your shots though, they’re really cool looking! Keep at it man!
Looking real good! I really like the second, fourth and last shots.