So keep it nearby as you start. Compare the original with what you see on the browser. Here's a few notes you'll find useful on the other 4 pages and when you read other guides and references. Words like this between angle brackets are called tags. They are format indicators and don't appear in the final text as viewed via the browser.
Most tags are in pairs.
If you set things to bold and forget to end the bold format, your text will not look as expected. A few tags are single, since their action is complete in itself. It makes it easier for other to make changes. And fonts and sizes are all relative to one another. Technically used to Include a section of quoted text.