Boobs are way too big. Should work on yuor shading, nice colours and out lines.
Holy smokes man, those boobs are attached to her neck! :)
It’s a good first try so keep going at it.
Take some time to a look at a reference picture. Boobs are never close to being that high on a woman (and if they are she’s got some massive birth defect).
Try to understand the skeleton underneath the surface of the body (and muscles as well). Then, you’ll be on your way to truly progressing.
It’s just that you drew this from the top of your head and well, we sort of have a fuzzy memory as to how things truly are when using our imagination.
High boobs vs low for comparison. It's looks a bit silly as an animation, but you get the idea.