Build me a private label store for AMAZON FBA and help me select and source the products

I’m looking for e-commerce professionals to help me setup a brand that sells its products both through Amazon and a self owned Shopify store. The brand is going to be based around low to medium cost, high quality- utility and other basic products. The model may take inspiration from amazon basics. Where, we will be able to sell products of various categories. The core value of the brand would be, ‘value for money, high quality products under a single label’. I require services starting from consulting to building the stores, finding the right products and their vendors and then marketing.
If you cannot help with all of these services, please let me know which parts of it fall under your scope of work so we can discuss accordingly.