I'm entering LABEL now. Questions about concepts

I'm going to create a web page linked to DB I'm going to use the La Label Framework because I want to use it to study. We have completed the current installation and succeeded in displaying the main page of the label.

Now I'm trying to create the page I want by linking DB, but it's my first time using the framework, so I'm a little confused about the concept, so I want to get help to correct it.

So far, I haven't looked into details thinking that I'm just going to install it, but I thought that I would drag and write the framework by providing the corresponding function like SDK. Just like creating a new project with an SDK underneath and using it as you please.

However, after completing the installation, looking at the structure of the label, it seems that it is not that concept, but creating a page in the label directory installed on the server. In other words, it seems that the installed label directory itself becomes my application, so is it correct that I understand?

I would appreciate it if you could give me advice if there is anything else I should know about introducing lavel.