Which courses should I take in order to learn ML and AI?
In my opinion, start with:


Coursera's Andrew Ng's classes


Machine Learning (very good for the maths)
then go to his deep learning class (I haven't done it but I only hear good things from it)

Udacity had a very good Data Science Specialisation divided in 4 classes. I don't know if it's still available (I did it two years ago) but it is probably either still there or an improved version has replaced it. The 4 courses where:


Intro to Data science
Visualisation
Machine Learning
Text Mining



For the rest, I suggest you to do a quick google search...