I haven't used Apache on Windows in a very long time. As I recall, there's some configuration to be done after you've installed WAMP, but it's not difficult.
Because you'll be using your WAMP installation as a testing server, use "localhost" as the server name and "admin@localhost" as the admin address.
By default, the document root is C:/AppServ/www. You can change it if you like, but usually, there's no particular reason to do so. To access your site, go to
http://locahost/ . (Of course, make sure you start the services.)
As a beginner, you're probably best off testing your scripts locally before uploading them to a live Web server. You'll also want to read up on PHP security, especially when using databases. Insecure PHP code combined with MySQL makes for an easy target for script injection. Always remember the old adage, "Never trust user input."
Richard