Girls all Happy New Year ??? Please advise me on a good sulfate-free …

Girls all Happy New Year ??? Please advise me on a good sulfate-free professional shampoo and for hair loss. Because I have such a pace of baldness forming on my head. I recently went to a salon before New Year's Eve, got myself in order, dyed and did Botox for my hair. They said it's best to use only professional shampoos and masks. Now I don't know what to buy. What do you recommend? Who uses which one?