This video covers adding pages and post to WordPress. I covers adding a blog to the site and making it different from the home page, setting your home page and adding a image and simple gallery. Please not that it does not deal with page builders. Also there might be some slight differences with a different theme but the concept is pretty universal.
A note on page builders, I am not a big fan and find page builder hard to use for beginners. When I find a page builder that I really love I will post a video on that topic.