When you are creating your site you can click on "preview page as viewer" under the "more actions" tab to get a realistic idea of what your page will look like to your viewers.
To begin you click on the item you want to insert and it will appear on your page. It is easy to move afterwards.
Move content, change the size and crop images- by right clicking in the text box a menu will display
Change the theme and banner to modify the look of the website-click the title and check out the options from the menu
Create and name new pages- click the 3 dots to the right and follow the menu
Upload video and images
Organize the site, drag the content to where you want it