How to fork bitcoin?

Question

C++ / C#

There is a task to create a fork of bitcoin, for academic purposes. How to generate a genesis block, how to connect a second node, how to change ports and other settings.
In theory, I know how it works, but in practice I have some difficulties. Prompt for a fresh guide, or can someone help.

Answer 1

for academic purposes, an article from habr is not suitable?
https://habrahabr.ru/post/323586/
Blockchain in 200 lines of code