Why can't I see anything when I type the domain name that I've registered into my browser?
Simply put, it's because there is nothing to see.
A domain name registration merely allows you to reserve a domain for later use with a hosted web site or hosted email accounts. So, a domain reservation alone does not make it possible to post web pages. For that, you need something more.
Imagine that your city allows people to reserve street names for their homes. You could choose any street name you want, pay the city a fee, and reserve that name so that no other street in the city could share that name. That's a lot like registering a domain name.
However, just because you've paid the city to reserve the name of the street, that doesn't mean they're going to hand you the title to property as well. This means that while you've got the right to use that name for your street, you still don't have a street!
If you want to actually pave a street, well, then you've got to go and find yourself some land. So you negotiate with someone who has a nice plot of land he's willing to sell you. That's a lot like finding a virtual host or internet presence provider (IPP). IPPs allow you to use their servers, which are connected to the internet 24 hours a day, to store your files so that anyone can access your web pages, any time. And, unlike most landowners willing to sell you land, the IPP will often also help you to send and receive mail that is addressed to your domain.
But wait, now. You've got yourself some land, but the whole idea was to have a home that stands at the address you've chosen for it, right? Well, now you've got to build it. You can either take a quick course in construction, buy a do-it-yourselfhomebuilder's kit (which we liken to buying a web authoring tool, or hire a construction company (which we liken to a web designer to build the structure for you.
So you see, a domain name registration is just a license that allows you to use your domain name with your web site. Without any "real estate," there's nothing for people to visit!