There are occasionally times when I'm looking up how to do something or want to install something new and come across a statement like "for intermediate/moderate/advanced users only". As an example, installing arch linux seems to be one of the recommended "projects" for linux intermediate users -- with installing Gentoo being one for advanced users.
How do get from being a "beginner" to an "intermediate user"? What should I be doing to learn more about linux and how it operates? How will I then know that I've achieved "intermediate user"hood?
For reference, I've been using Ubuntu and Linux Mint for about a year now. But I mostly don't do anything in it that I wouldn't do in Windows. Other than occasionally choosing to use the terminal to install/remove software instead of the package manager, most of my time on my computers is surfing the web, listening to music/ watching movies, and reading pdfs. So I don't really feel like I'm getting the full linux experience. What should I be doing to become a better linux user?