To edit a page, click on the pen icon.
The editing toolbar will appear, giving you options to change text size, colour and font. Experiment with the front page. If you change the name of the page, it will change the link on the navigation bar.
Click on save each time you finish editing a page.
Each page can be accessed using the links in the side bar. Edit each page; make a small change so you get the idea. Make a journal post. (This is your blog)