Free certification courses by Google

Free Python course: https://www.kaggle.com/learn/python

Intro to machine learning: https://www.kaggle.com/learn/intro-to-machine-learning

Intermediate machine learning: https://www.kaggle.com/learn/intermediate-machine-learning

Intro to deep learning: https://www.kaggle.com/learn/intro-to-deep-learning

Computer vision: https://www.kaggle.com/learn/computer-vision