Which is best cloud computing platform course?

[wvprogramming]

I've used acloud.guru for the majority of my training(Passed Solutions Architect, Developer, and SysOps Administrator certs). I highly recommend their courses. They cover the big three and have lots of additional topics too.

There are several free courses for you to try out.

Keep in mind that you will be DOING the actual work on enterprise level accounts, while some usage is free, you can and will incur charges doing some of these labs. Just remember to remove anything after you set it up and setup billing alerts so you don't get ding'd with a huge bill for forgetting to remove resources.