If you just want to learn the concepts at a basic level, there's free training on this page: VCA6-HC Certification
Take a look here: http://www.amazon.com/VCP-Cloud-Official-Cert-Guide-Certification/dp/0789751658
But, take in mind that this book is focused on the old VCP Cloud exam and not cover topics from the latest exam.
If you just want to learn the concepts at a basic level, there's free training on this page: VCA6-HC Certification