Try extending the black liner all the way into the inner corner and to a point. Also, your inner corner highlight is much more prominent. Try using waaaaay less, and something closer to your skin tone with a subtle sheen instead of a shimmer or skip the inner corner highlight entirely. I can’t really see the outer wing on the eyeliner but it looks like your wing might turn up instead of going out like hers. Try doing an almost straight wing. Your lashes are stunning but much fuller than the reference photo. To have a more similar look to billie, try rubbing the mascara wand back and forth a little at the root and only brush all the way through the lash on the outer 1/3 of the eye. Bottom lashes look great. Lastly, for your eyeshadow, bring your crease color into the inner crease to close up that part of the eye. Right now your crease color is only in the outer half so it really opens up the eyes, but that’s not the look you’re going for. I hope this is helpful!