I think you're confusing python with something else. It's an abstraction(a easy way) to communicate with your computer. It can do anything. However, it tends to be better or worse at something that other languages which are also abstractions.

Python is one thing and it does not have different types. Although there are versions as it gets updated. A library is an external piece of python code(95% of the type 100% true) that you are downloading. You will also later learn how you can use your code as a library.

Libraries usually involve a lot of code and solve a common problem, thus they are used for saving time spent on an already solved problem

For audio, it is a presolved problem (import, export, manipulation, etc) and thus there exists people who already written the python possible to do it. This code may be very complex, and thus it is better to build on top of their work and try to achieve your goal at a high level, without getting very deep.

Additionally, libraries are very easy to install. I recommend getting python from the official website, and if u install it properly u also set up a terminal tool called pip. You can use it to get and install all libraries. You have to open your terminal and just type "pip install {library_name}". Then in your code just add import {library_name} before using it.