Build me a website by Shopify

I currently have a business that goes through the online sales of food, in which we ourselves transport and make the orders. It ends up being a kind of take-away but with compulsory delivery, without the possibility of collecting the order in a physical place, since the customer can not go to any collection point. We currently receive customer orders informally through social networks, we have a document where we register the same orders for our internal management and proceed to prepare the dishes. The order is weekly, which allows us to manage the business in a quiet way. However, with the growth we have had, the need to set up a website has been a key point for us at this stage. Therefore, we try to develop a website that is informative, so we intend to communicate the weekly menus, but more than that, we want each client to have his / her client area, that is, we want the client to have his / her account through a register previously made in our website, and that when choosing each one of the dishes in the desired dose, accumulate this request in the "cart" to later finalize the order when proceeding the payment of the same. It turns out to be an E-commerce site, but we want it to be in this way that I mentioned. We intend to have about 5/6 pages, in which some may have a form to request quotes for caterings, FAQs, among others. We want to have the autonomy to change and / or add new products, as well as to edit texts and content. Something that Shopify will give us. I do not believe that it is much more complex than I describe above, we have some specific requirements, but later I can explain in detail what we want. I await a response to then review your proposals and make a decision. Thank you very much.