When creating your HTML, you will simply use Notepad.
A great point of reference that explains different tags in HTML is w3schools.
You may still be adding content to your website.
This task really covers a few extra things that you need to have a look at to get your web site up and running.
You need to think of a topic that you will design your website on:
You need to design your website on paper first, by folding an A4 sheet of paper into 8 sections. Your site should have a minimum of 4 pages.
Accessing your wordpress site: http://computingdhs.co.uk/yourusername
Login and edit: http://computingdhs.co.uk/yourusername/wp-admin
Each site/user only has 20MB of space.