Hi Marco. Actually my way to learn Machine Learning is attending to lectures, taking notes, completing projects and then reading scientific papers. I’m lucky because there are lots of lectures to take on ML and great academisians at university. So the sources of this article are my professors :)
But I can definitely suggest you to take a look at mathematicalmonk’s channel in Youtube. Here is the link https://www.youtube.com/playlist?list=PLD0F06AA0D2E8FFBA
Another course you can attend is from coursera https://www.coursera.org/specializations/machine-learning I haven’t taken this course but Emily Fox and Guestrin are famous people in ML and this will definitely help you.
I think these courses fit to people who are completely new in machine learning. I hope these will be useful for you.