Do you know any other free platform where I can learn some basic principles in Computer Science?

Hello friends!
I was wondering if you could help me find any other free platform when I can learn some basics concepts in Computer Science, because as a beginner, I want to improve my vocabulary in this branch.

Don’t know how advanced you are but this is a very popular basic CS course that is completely free.

Harvard University CS50’s Introduction to Computer Science

Thanks a lot. I will check it out.