Do you already have an Internet Service Provider lined up to host your domain and web site on their servers? If not, that is the next step. You can either use a local hosting company in your hometown, or perhaps the company with whom you registered the domain name.
Once you have that in place, you can create a web site that is as simple or fancy as you'd like. For a very basic web site, you could just use MS-Word and save the documents with a .htm extension. For fancy sites you might want to buy MS-FrontPage or some other web site creation software.
With the MS-Word option, you can just use some FTP freeware to transfer your .htm files to the ISP's hosting server. The ISP will have to help you with how to gain access to their server due to security, etc.
I know this was somewhat vague, but I hope it helps.
- Mike