2 sections added to my shopify store, RETAIL AND DISTRIBUTOR

Hello, I need 2 sections added to my shopify store, RETAIL AND DISTRIBUTOR, Below condition require: >Both will have a main area anyone can access and have password area with information. >In the background, the Distributors manage the retailers, they sell them products to get a commission (just to help you understand why its set out like it is) Retailers have a store. >Distributors are individuals who go and talk to shops and make commission. The retailer needs to have information on their main page then somewhere to signup so I have their information. > I am happy to give them the password manually for the other area, when thy get the password they can order stock at the reduced price and also do marketing. >The distributors are similar, They need a sign up page, I can give password manually, in there will be a contract (can send) in a document format if possible I can do that. >They also need to be able to purchase on behalf of a business so they need a business signup form on their side. > i would like automatic thank you sent when they signup plus when they complete a purchase.