I’m wanting to create a new store using Shopify that will have several different products, each having different variants (small, med, large; red, blue, yellow). I think I will need to buy from multiple manufacturers. Since it’s a new store, I’m trying to keep my overhead low. I intended to purchase my stock, package and ship myself, unless dropshipping is a better way. Anyone have advice on how to judge order quantities? And how to go about testing with more than one product?