I'm curious about how to strengthen my nails.

Lately, whenever I look at my hands, my fingernails feel weaker than before.
I don't even get my nails done often, but sometimes they break or crack easily.
I apply hand cream often, but I'm not sure if it actually takes care of my nails.
I started wondering if I should use something like cuticle oil.
I'm more concerned because I've heard that nails need separate nutrition.
I'm also worried that using more products might be excessive.
I'm also worried that it might get weaker and weaker if I don't take care of it.
So I'm wondering if I need to take separate care of my nails these days.