In order one website to go live, you need 3 parts:
domain + hosting + website source.
In this your case, you've just only had the 1st part, that is your domain name. So the next steps are you should buy hosting and make a website.
About buying hosting, you can buy it from many big guys such as: Godaddy, iPage, Fatcow,…Especially with Godaddy hosting, you can buy using coupon just only for $1/month. Or you can research many other big guys to compare their service each other and choose the suitable one. You buy hosting as simple as you buy the domain.
After you have your domain and hosting, the next step is choosing the website source to build your website. The most commonly open source that is Wordpress. You can visit
https://wordpress.org/ to download the source for free and install it on your hosting. Don't forget to read carefully about the document before install. At this stage, you have domain, hosting, and a website installed on that hosting.
The next step is you need to point your domain to your hosting. The pointing process is based on each domain registrar you purchased. Read them at registrar website document. Basically, you just need to replace their default DNS to your hosting DNS that your hosting provider give you.
That're all you need to run a website. Good luck to you.
