The first thing I did when I was preparing for the certification exam was to perform the Enterprise Cloud Administration (ECA) Online 5.10 training available on the Nutanix University portal, this course is recommended for certification.
I found a lot of information on the youtube channel. And a big credit goes to The Nutanix Bible. I also sought in the Nutanix Community for support.
With a bit of SSD storage, a bit of RAM and VMware Workstation you can build some pretty kick-ass lab environments.
You can always Test Drive CE for absolutely free. I prefer to use the Nutanix Demo this time.
Next Nutanix certifications:
Update NCP 5.10 to NCP 5.15.
Nutanix Certified Advanced Professional 5.10
Good luck and put in your study time