Hi, could I get some kind feedback on these rejected photos?

Christin, I can tell you are having fun shooting, and that's the number one thing you need to always remember.  What Daniellei said is on point, so I'll add what could help.

I checked 4 photos and all were shot with the lens wide open at f4 and shutter speeds of 1/500 and 1/600  Are you familiar with depth of field? You have a good lens, but the blurryness in most of your photos suggests your lens needs calibration.

And even if thats not the problem, you're bettter off shooting with smaller f stops.

Since I don't know your knowledge of the mechanics in photogrpahy, I am going to send you some basic guidelines that might help you. Also, avoid shooting macro shots without a tripod, it is very dificult to get these shots razor sharp, as in your flower shot.

Again, I like what your eye is seeing, so don't get discouraged.

Also these....