Thin hair

My hair is thin. Even with perms or other treatments, it quickly loosens.

Because of worries about hair damage, I only dye or perm once or twice a year. It seems like thin hair falls out more and is more prone to falling out.

The problem is with the semi-curly hair~~

Do you have any tips or tricks for people with similar hair like mine when getting a perm or doing it regularly? I wash my hair once a day with a mildly acidic shampoo (because I feel it gets greasy faster), so if you have any other helpful tips, please share them with me ^^