The first thing you need to do before anything else is to get yourself a domain name. This is the name you want to give to your website. For example, the domain name of the website you're reading is "thesitewizard.com". To get a domain name, you have to pay an annual fee to a registrar for the right to use that name. Getting a name does not get you a website or anything like that. It's just a name. It's sort of like registering a business name in the brick-and-mortar world; having that business name does not mean that you also have the shop premises to go with it.
In all GoCentral Website Builder plans any data transmitted from your site will be encrypted using a SSL (Secure Sockets Layer) certificate. Your SSL will establish an encrypted link between your web server and the browser of the person visiting your site. This means that all data will be kept private; which is important if you want visitors to your site to be safe. If you want to sell products or services in your store, you will want to have a SSL since it protects credit card and bank numbers from being intercepted by hackers.
There are a number of free and commercial web editors available. If you use Windows, one of the best around is Microsoft Expression Web. This was a formerly commercial program that Microsoft now distributes for free, presumably because they no longer want to be in the web editor business. It is fully-featured and very polished (as befits software that was once sold in shops) with facilities that both new and experienced webmasters find useful. You can find a guide on how to use this program from my Expression Web Tutorial. The latter takes you through the process of designing a fully functional multi-page website that is mobile-friendly (that is, your site will work well on both desktop/laptop computers and the smaller screens of mobile devices like smartphones and tablets). Instructions on how to get the editor can also be found in that tutorial. building a website