You can learn web development at Harvard University for free.

The course covers:
1. Git
2. HTML, CSS
3. Flask
4. SQL
5. APIs
6. JavaScript

Link: https://online-learning.harvard.edu/course/cs50s-web-programming-python-and-javascript">https://online-learning.harvard.edu/course/cs...

Introduction to Computer Science and Programming in Python.

From MIT. For free.

For those who are looking for a more structured approach to learn Computer Science and Python, you get:

• Video Lectures
• Interactive Assessments
• Assignments

https://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-0001-introduction-to-computer-science-and-programming-in-python-fall-2016/">https://ocw.mit.edu/courses/e...

Learn Basics of Linux by Linux Foundation in Free.
"introduction to Linux"

Linkhttps://abs.twimg.com/emoji/v2/... draggable="false" alt="👇" title="Rückhand Zeigefinger nach unten" aria-label="Emoji: Rückhand Zeigefinger nach unten">
https://www.classcentral.com/course/edx-introduction-to-linux-1857">https://www.classcentral.com/course/ed...

You can learn "Algorithms -1" by Princeton University via Coursera.

There are 2 part of this course.

Part I: covers elementary data structures, sorting, and searching algorithms.

Linkhttps://abs.twimg.com/emoji/v2/... draggable="false" alt="👇" title="Rückhand Zeigefinger nach unten" aria-label="Emoji: Rückhand Zeigefinger nach unten">
https://www.classcentral.com/course/algs4partI-339">https://www.classcentral.com/course/al...

You can learn "Algorithms -2" by Princeton University via Coursera.

There are 2 part of this course.

Part II: focuses on graph- and string-processing algorithms.

Linkhttps://abs.twimg.com/emoji/v2/... draggable="false" alt="👇" title="Rückhand Zeigefinger nach unten" aria-label="Emoji: Rückhand Zeigefinger nach unten">
https://www.classcentral.com/course/algs4partII-340">https://www.classcentral.com/course/al...