Nice to see you started drawing (again)
So, my usual "things you should keep" and "things you might change" speech:
First, the things to keep:
- The face is spot on, and matches the original quite well. Yep, she has a certain Amy Wong like quality to her, especially the Asian touch on the eyes. (Add Amy pineapple hairstyle, and that's it
- Your lines have a rather round, flowing character. Making them of course very suitable for a pin-up girl drawing.
Now, I do not have really "things you should change", but maybe some "things you should add":
- Your lines are rather soft, with a very "shading like" character. Maybe you might consider adding just a few sharp lines to define the outer contours and the most characteristic features, e.g. the tip of the hair, the eyelashes, the lace structure on the bra, etc...
(I am thinking a bit of Michelangelo, who also rather went for nearly mere coloring/shading, framed by such a defined outer line).
(Sigh...again, the "constructive criticism part" is the longer one, and it will look as if I have more to complain than to praise. Once again I feel the need to point out this is not the case...)