easily broken fingernails

My fingernails break really easily.

It breaks immediately if it bumps into something while being active, so I can't grow it.

Applying nutritional supplements doesn't have much effect.

If you apply a nail strengthener like nail polish, it seems like they break a little less due to the elasticity.

Since the strengthener is similar to nail polish, it needs to be wiped off with acetone....

Please teach me some ways to care for brittle nails that I can do at home.