You will probably want all of your pages to have a title, a heading, and your address at the bottom. To ensure a consistent and complete look for all of your pages, you should start each one with a template. This is the template I use, and it works pretty well. Whenever you want to make a new page, just copy the template to the new name, and then edit it to your liking. The HTML tutorial above tells you a good bit about adding images to your home page, but it doesn't tell you how to get those images.
Most web browsers have some option for copying images off of pages.
GIF images are the best for WWW use. They load pretty quickly, and you can manipulate them easily with xv. Or, suppose you want to grab an image off a Matlab graph, or you want to take a snapshot of the menu bar for Netscape. The xv controls should pop up as a new window. If you click that with the left button, you will get another window asking you how long to wait and some other stuff.