kinda depends on what you want to emphasise in the picture.

if you have a picture that hasn't any real detail on most things, but a great deal of detail on one aspect, that aspect, like hands, is being particularly emphasised.

but, in general, try drawing a pentagon for the main palmy bit, then squished ovals, 3 per finger, 2 for the thumbs. Flesh it out a bit, toss in a couple halfmoon lines across her fingers where the second knucle goes, and ba-dum.

female hands are supposed to be all smooth and delicate, so the fingers should be fairly long and slender. particularly so with Yuna cuz she's still a little girly-girl in x-2.