With the initial questions out of the way, Wix will ask you if you trust the ADI enough to let it build an example website for you, or if you want to build everything by hand. Going with the ADI is a much more efficient approach, especially since you can come back later on and customize every little detail of your site. You’re not stuck with the initial suggestions that Wix gives you.
Toolbar- The Toolbar element is another element which is great. You will find a toolbar, rulers, grid-lines and snap to objects. These help users build their websites. Grid-lines help you arrange your websites in a nice layout. The snap to objects is a great part of the tool’s element. This helps users place objects and apps on their website easily. It uses the grid-lines to snap the objects to edges.

Hi Glyn, You can indeed keep your domain name. Domain registration is a separate process to site building, so there's no risk of getting one stuck on a platform you don't want to use any more. Wix is great at walking you through the domain transfer process step by step when you sign up. There's an official video guide here if you'd like a sense of how it's done. Hope that's helpful! Ta, Fred
If you’re using Wix’s free plan, then you won’t be able to use a regular domain name like “www.mysite.com” or “www.mysite.net” (domains like this come with Wix’s paid plans). Instead, your site will follow the format www.yourname.wixsite/yoursite, which is enough to get it up and running. But if you’re going for a more professional look, then we recommend upgrading to a paid plan to secure a more polished domain!  
With WordPress being such a versatile website platform, it’s no surprise that it can let you build a fully functional eCommerce online store. By fully functional, we mean that you can list any number of products, make them available for sale, and then also collect orders from customers and even handle all tax- and shipping-related elements of the whole process.