Working with Powdered Surfactants Video Tutorial + Formulation

This is going to be a two-for-one. I got a request for guidance on working with powder surfactants. I do have a written post on this topic too (Link). I was also going to make shampoo for my mom. She has curly hair and is color-treated. So my goal is to make something mild. I want her hair to feel moisturized after using the shampoo and conditioner.