Hiya hermione....

Harry Potter Chat > The Wizarding World > Diagon Alley > Hogwarts Express

if you click on Hogwarts Express - you should have a button - (close to the top left of screen) called NEW POST or NEW THREAD.

this will allow you to introduce yourself and say hi. Once you have done this just respond to any posts that seem to take your fancy.

the more you post, the more areas you can explore. It's pretty good really.

Anyhoo - hiya - welcome aboard. I look forward to reading your introduction!

Cheers,