Local home pages are made the same way as everywhere else: by making a directory called public_html in your home directory and granting everyone read and execute permissions there and to your home directory. Then create a file called index.html in your newly created world accessable WWW directory. That file is your main home page. More instructions on writing HTML documents can be found here or in Finnish here.
HTML Validation Service is a very useful service which can be used to check for syntactic errors in any HTML document. You just enter the URL you want to check and after a short time you get a list of errors found in that document.