Custom post types for beginners

Hello!

I am using an ElegantThemes template with a multimedia bar that displays photos and videos on the home page. The bar is populated with content from posts. However, my site does not have a blog. From what I understand, I need to then create custom post types to upload the content for the multimedia bar, but the ElegantThemes site doesn’t offer tutorials on custom post types. So this is where I get stuck. I’ve done a lot of Google searches, but can’t seem to find any information for beginners about how to create custom post types. I’m not even sure if this is what I need to do to create the multimedia bar!

Any help would be greatly appreciated!