Start Blogging- The start blogging element allows users to start their blog on their site. Here you can manage or upload a new post to your site. Posts can be about anything on your site, but ideally, they should surround the topic of your site. For instance, if your site is a photography portfolio with a blog, ideally posts will be about your experience taking photos and even about the equipment you use.
This will start to set the colour of that part of the page. Just click the right colour for you. To set the background of the rest of your page. Click on the background element. Here you can choose a colour for this or even add an image. To add an image, click on the image button within the background element. You will see many images from WIX, or you can add your own. The WIX images are usually free to use. You can upload an image from here or use one of your already uploaded images. This is how to upload an image for everything.