Look into Lights Lacquer for nail polish. The quality is fantastic and the color selection is great!

Use a cuticle oil every night to pamper your nails. Sally Hansen makes a nice one. You can also apply a Sally Hansen nail strengthener to keep your nails from breaking! And buy a glass file to shape them nicely, and only file in one direction.

For makeup, you might like the Huda Beauty Light Neutrals palette! It has a really nice formula and soft, pretty colors which are hard to get wrong. The Charlotte Tilbury Pillow Talk eyeshadow quad also may work for you.

Check out the Shea Moisture Coconut Custard hair oil for dry, brittle hair. I apply a little bit after I shower when my hair is damp and towel dried, and it makes my hair really soft and smooth and nice. Also look into Olaplex (sold at Sephora); they have a whole haircare system which is incredibly popular and works really well.