Welcome. A nice collection of images. A few thoughts...
1. Zoom/crop in a little more tightly on the main subject; too much empty space image left. also try and get the head in the image, a 3/4 profile might have made the image that little bit better.
2. Nice idea, good exposure, but the DoF is a little shallow and the lower hand appears slightly soft.
3. Nicely done, but about 1/2 stop under-exposed. Try and avoid putting horizons at or near the centre of the image.
4. The large, unfocused flower in the foreground, and distracting background pattern don't help this image. Remember in close-up/macro work, the rule of thirds doesn't really hold.
5. Again, a tighter zoom/crop needed.
6. Nice idea, however the focused stalk of grass is hard to pick out against the unfocused ones; look for contrasting backgrounds.
7. Nicely done. good composition, however the featureless sky doesn't help. Try this again on a day with a nice, dark blue sky. If you have a polarizing filter, try that.
Just my $00.02 worth - your milage may vary.
~John