Great tips Alberto!

Note, also there is a video you can watch here that I recorded in December: https://learning.oreilly.com/videos/aws-certified-machine/9780135556597.

I also wrote a practice exam and about 200 example questions for the video here: http://www.informit.com/store/aws-certified-machine-learning-specialty-ml-s-complete-9780135556511

Finally, a bunch of colab notebooks that show some of the style of machine learning material you should prepare for is here: https://noahgift.github.io/aws-ml-guide/intro.html