Definitely you would some hands on experience on the product before you can sit for the exam. vSphere ICM course is the pre-requisite for the course but you would spend more time to learning before you sit for the exam.
You can download the vSphere products for trail version and work on it. You can build a lab based on VMware workstation which is good for studying , There are also free online training videos available which can use
If you search for vSphere lab you will get huge number of options, This one is good to start
Building the Ultimate vSphere Lab – Part 1: The Story | Boerlowie's Blog