On: Qusim.py – A toy multi-qubit quantum computer simulator written in Python

[Deestan]

This sounds snide, but please believe me my intention is to be helpful.

Have you considered instead raising your level? The relevant topic, as stated in the comment, is linear algebra.

[perl4ever → Deestan]

My experience with linear algebra is that it's possible to get an excellent grade in class, without learning anything, provided the tests are multiple choice...