Answer 1

Christian Huml
no

I see you are learning OOP with Python...
My feeling is you are driving too deeply into the dunder methods.
It is rarely that there is a need to modify them. Concentrate first on creating attributes and methods, and making custom classes that are useful to you.

Answer 2

__new__ creates the instance and returns it to __init__. __init__ then initializes the instance. That's why self is required. It points to the instance that __new__ creates.

Answer 3

Christian Huml
here is a YouTube channel I regularly visit.
The contents are great and there are also some good videos about dunder methods.
https://m.youtube.com/c/mCodingWithJamesMurphy