How to keep bleaching sustainable?

How should i keep my hair healthy even though i bleach it? I am naturally a wavy dirty blond but i bleach my hair every two months. I have pretty short hair and trim it every two months. I dont style it with heat. I wash my hair about two times a week, once only with water and the second time i put in a hydrating mask, i wash it with daddy’o purple shampoo, wasabi Chan shampoo and then glory conditioner(all products from lush) which i keep in for about twenty minutes. Am i taking good care of my hair and keeping bleaching sustainable? If not what should i change and how should i take care of it? The photo i added is how my hair looks like Currently