Resources to put a web application online? [on hold]

I'm a trainee developer, who is making his first steps in web development.

I don't understnd how to put something online, once I have built an entire web application.

I'm currently mounting a web server and I'd like to understand what I'm doing. I'm building a blog with django. I'm setting the URLs, the IP address, and the database. I'm following the Djangogirls tutorial.

Any resource where I can learn more about what I'm doing? I'm just following the tutorial mechanically and I don't like it.

Any book or online course? Something in Udemy? How did YOU learn about it?

Thank you!