Sure thing man. Artists have to help each other ^^ I took the liberty of making lots of lines on the picture to illustrate proportions, relations, light and dark on your picture.

Alright, a few words to the pictures. The breasts look like somebody with an operation. However, natural breasts sag. Shoulders curve downwards, and show (mostly) one prominent muscle. Hands reach the hips roughly one hand's length away from the knee caps (can be less and greater depending on your preferences).

The legs are waaaay too short man and you seemed to have lost focus on the lower legs.

Curves are fine, but you overdid it on her midsection. She has sclerosis- her spine is a little crooked and her head a little too far to the right. She has no muscles whatsoever and her thighs make a balloon shape if you were to finish drawing the arc. The arms are too short and she has an impressively broad torso. Think of the rib cage as it defines the torso. That's why the mid section goes inwards.

The plus on her stomach is probably just for reference so I'll discard it. Her six pack is lower though in case that's where you wanted to put them.

Other than that, the head proportions seem alright, and most changes in the proportion can be easily sketched over the picture. Try not to do too much coloring and shading without having finished the body completely.

Hope it helps!