Move my Wix site to Shopify

I am with the design, but feel the need for a more robust platform to better manage my sale channels and inventory. I also want to use shoplift to invoice B2b buyers and also a physical POS Store in addition to my amazon and flipkart sales channels ( some of which may or may not be supported by Shopify yet).

So looking for an overall shoplift expert, who can build the website and also guide me along on using the best tools and addons for my business model.