The main ingredient in lash serums that cause orbital fat loss are prostaglandin analogs. it's literally used to treat glaucoma lol; it also causes your eyes to become more red and darker eye circles. look for a lash serum without prostaglandin analogs, however i heard thats the only real way to grow your lashes rapidly, I tried the ordinary lash serum and it def made them thicker
and no, u cant use it for fat loss anywhere else because the eyelids are a really thin layer of skin it won't penetrate anywhere else because it is too thick.
colored contacts are trial and error, but for me at least hapa kristin looked the most natural and provided a lot of diff color options + sizes
https://hapakristin.us/product/h78681j2. the ones u posted looked a lil too green tho, imo.
in terms of contour, it depends on your facial structure and the illusion you're trying to present/overall look. You can actually incorporate both. contour is made to sculpt your face and bronzer make you more sunkissed and adds overall life/plumpness to your face. Your face already seems pretty v shaped to me, so maybe just contour directly under the cheekbone and a blush right on top of it; and apply a bronzer to the outer temples forehead. You just have to make sure you find the right shade of contour because it can easily make you look more retarded. i can't rlly tell for you because lighting/camera changes skin tone
lip oils provide moisture gloss and tint to the lips. the clarins one is rlly good