My nails are kinda weak...?

I wear nailpolish a lot and i think that has a big effect because a lot of nailpolish = lotsa nailpolish remover. both products damage your nails, i think. lol But my friend also does her nails a lot but she has naturally strong nails and i dont. i have my moms nails and hers are very weak as well. I was wondering if i started putting cuticle oil on, from this company called "etre", if it would make my nails better. if so, how often and how much should i put on? my nails chip from the top, like a layer of my nail peels back sometimes, or it just breaks i really want to grow out my nails but it never works for me. any tips or feedback? please let me know :)