I don't know how to write a page, etc.
So, you don't know how to create a web page?
Well, a good place to start is a hard copy manual of good web standards practice. Get these books:
Beginning CSS Web Development by Simon Collison.
Build Your Own Web Site The Right Way Using HTML & CSS by Ian Lloyd
Learn good web standards and practices. Write your pages. Get some free FTP software like FileZilla and learn how to upload your files to the web server. Your hosting company should have blow-by-blow instructions on how to get your FTP server to upload your website to their server.
That should be a good start for now. Read the books throughly. Be prepared to be a little frustrated with the CSS part, but the rewards are bountiful.