I think Chanel looks best in flaps style . Just my two cents. I love all kid of flaps, but prefer the cc turnlock most. Even though I'm quite tall (5.7"), but I think m/l classic flap looks best. I would recommend u to try on m/l classic flap as for your first Chanel. You will fall in love with it and wanting more and more (like I am now lol). I think fuchsia color looks so beautiful. You can always get black later if you are certain this will not be your last Chanel. Black will always be there. Go for the color first.
Do you have any modeling pictures? I'm 5'8. I wonder how long the straps come.