build a website

I am a medical doctor and pharmaceutical scientist that needs a website to sell my custom health products. I own the domain name through Namecheap. I'm contemplating using the Shopify platform to host. I'm aiming for simple and classy. Basic selling functionality is necessary. Eventually I'd like to construct a form where someone can include free text and select checkboxes to create a custom product. It also needs to have links to Instagram and twitter accounts.