Do you mean in your wordpress?
If so you go into the article blog through your Pages or Posts and hover over the one you want and you should see words appear.
You click on Edit.
The next screen is your article/blog in Edit Mode and you can edit all you want in there.
After you're finished you simply click Update or save as draft if you haven't yet published it.
Hope this helps and if it isn't what you wanted then get back to me.
Robert Allan

Hi,

this all becomes clear when you continue with the training.
Don't care too much about the visual aspects of your site. Content is the most important thing!

Cheers
Moritz