Curious about Affirm Fiberguard? Where to buy full system together

It seems like everyone is saying you should use cream/activator AND shampoo AND fortifying treatment and not skip either. Where do I buy a bundle of all of these as a non professional

I’m autistic with sensory processing dysregulation so I don’t want to go to the salon and get it because it involves people touching my head in weird ways that puts me in emotionally/sensory dysphoric state

Right now my hair just silk pressed.