Yes, there are many free online Cloud Computing courses that are available on the internet. They all are MOOCs (Massive Open Online Courses) that are from prestigious universities around the world. But the reality is that you might be able to gain knowledge even though limited, but there is no certification or any validation that you have successfully completed so and so course. And there you lose your point. You could refer to these courses if you pay for their certifications because then only your credentials are worthy. Instead, I recommend you check out Intellipaat’s Cloud Computing courses which are designed keeping in mind the industry needs. If you wish to get started right away with Cloud Computing, I suggest you watch the following video on Cloud Computing Basics for Beginners.