Unzip the downloaded file and place all those files into your Sims 4 Tray folder, which can be found at
Documents » Electronic Arts » The Sims 4 » Tray.
Don’t forget to download all the custom content listed. Otherwise, your sim won’t look like mine.
Place custom content files into the Mods folder located at
Documents » Electronic Arts » The Sims 4 » Mods.
CAS Background: https://katverse.com/custom-content/cas-backgrounds/
Skin: https://the-real-sammi-xox.tumblr.com/post/166472585202/this-is-my-first-skin-blend-so-if-theirs-something
Skin tone: https://www.thesimsresource.com/downloads/details/category/sims4-skintones/title/skintone-set-v2/id/1313399/
Baby hair: http://candycanesugary.tumblr.com/post/152214968875/baby-hair-serena-hope-you-guys-enjoy-the-new
Hair: https://www.thesimsresource.com/artists/Ade_Darma/downloads/details/category/sims4-hair-hairstyles-female/title/ade–tay/id/1392136/
Mouth corners: https://www.thesimsresource.com/downloads/details/category/sims4-makeup-female-skindetails/title/mouth-corners-n03/id/1330957/
Freckles: https://katverse.com/custom-content/makeup/
Eyes: https://katverse.com/custom-content/eyes/
Eyebrows: https://www.thesimsresource.com/downloads/details/category/sims4-hair-facial/title/velvet-eyebrows-n92/id/1342470/
No EA eyelashes: http://cienzroza.tumblr.com/post/160017930275/no-ea-eyelashes
3D Eyelashes: http://kijiko-catfood.com/category/the-sims4/ts4-makeup/
Face contour: https://katverse.tumblr.com/post/165197284792/face-nose-contour-ctr01-categories-blush-face
Cheek highlight: https://goppolsme.wixsite.com/goppolsme/single-post/2017/09/10/GPME-FENTY-BEAUTY-Match-Stix-Shimmer-Skinstick
Eyeliner: https://katverse.tumblr.com/post/165760178682/black-and-white-eyeliner-bwey01-eyeliner-3-options
Eyeshadow: https://www.thesimsresource.com/downloads/details/category/sims4-makeup-female-eyeshadow/title/fox–eyeshadow-02-hq/id/1352836/
Blush: https://www.thesimsresource.com/downloads/details/category/sims4-makeup-female-blush/title/imf-rosebud-blush-n.24/id/1385177/
Lipstick: http://blog.naver.com/kero7423/220546346374
Nails: http://www.jomsimscreations.fr/makeup-sims-4.html
Earrings: https://www.thesimsresource.com/downloads/details/category/sims4-accessories-female-earrings/title/eternal-daisies–fearrings-/id/1389942/
Bracelet: https://www.thesimsresource.com/downloads/details/category/sims4-accessories-female-bracelets/title/s-club-ll-ts4-bracelet-n09%2365288%3Bupdate%2365289%3B/id/1374880/
Top: http://www.elfdor.com/2017/10/fifthscreations-rosa-top-recolor.html
Skirt: https://www.thesimsresource.com/downloads/details/category/sims4-clothing-female-teenadultelder-everyday/title/the-vanora-skirt-%28original-mesh%29/id/1386378/
Dress: https://www.thesimsresource.com/downloads/details/category/sims4-clothing-female-teenadultelder-everyday/title/hard-feelings-dress/id/1392148/
Shoes: https://sueladysims.tumblr.com/post/165095470218/madlen-cesena-heels-recolor