One toolbar is used to set the style of the text you type. You can have italic text, big text, colored text, centered text, and so on. The other toolbar is used to add HTML features such as graphics, links, and tables to the page. I suggest that you start by typing some text for your page. Start with a headline for the page, on a line by itself.
Press return a couple of times, and type in a paragraph or two of introductory text.
Once you've gotten some text on the page, you can go back and add formatting. First of all, you should try changing the color of the text and of the page background. Click on the page with the right mouse button. A pop-up menu will appear. This dialog box has several panels.