Computer Science : Harvard's CS50 : https://cs50.harvard.edu/x/2020/
Python : Python Programming Beginner Tutorials : https://www.youtube.com/watch?v=YYXdXT2l-Gg&list=PL-osiE80TeTskrapNbzXhwoFUiLCjGgY7
Data Structures and Algorithms : Introduction to Algorithms : https://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-006-introduction-to-algorithms-fall-2011/
Computer Architecture : Build a Modern Computer from First Principles: Nand to Tetris : https://www.coursera.org/learn/build-a-computer