Based on the sample site you provided, it looks like you are going for a minimalist design, which I can easily deliver.
I can deliver your ecommerce site using the WordPress WooCommerce theme.
How I propose laying out your website is with a simple white background, with your logo/branding at the top, with a menu below. The structure I will use is known as a "Silo" structure. This means you pages are grouped by topic which makes it easier for search engines like Google to index and categorize each of your site's pages, making future Search Engine Optimization (SEO) easier to do. This structure also makes it easier for visitors to find exactly the products they want with a minimum of clicks.
I will use the formula of providing engaging content above the fold, especially on the Home Page, to draw visitors into your site and ultimately to your product pages. If you have any specific products you want to feature either now, or down the road, I can also set up product specific sales funnels similar to this funnel I designed: www.projectfreedomgroup.com. This system will not only sell products for you up front, but also enable you to capture the visitor's contact info for later email follow up, this way, even if the visitor does not buy right away, you have the opportunity to draw the visitor back and get the sale later on, or generate repeat sales from past customers.