>> Enter Your Content with the basic HTML editor. (You can just delete all this starter content.)

Click the WYSIWYG OFF (to turn it on) button. Now you can see your page editor - 

When you are done, click the far-right button in the top toolbar.   --- If you want to discard changes, click the far-left button.

>> No need to set fonts, sizes, colors, image sizes, etc. Just add headings, content and pictures.