Recs needed for shampoo/conditioner!

I have fine, thin hair that has a little wave and is often dry. I am planning on getting balayage soon. What shampoo/conditioner would you recommend for my hair type? I tried Lanza in the past, but a lot of my hair broke and fell out. Idk if it was from the balayage, hair products, or stress at the time.

I want something color preserving that hopefully doesn’t have tons of chemicals, will allow my hair to keep its wave/curl, and won’t weigh it down or dry it out.