When you install the vCenter Server Appliance (VCSA) you will be able to connect to it with PowerCLI and having access to all systems linked to that vCenter instance; so the datacenter as an object, a cluster, each host and each datastore as well as all other related objects such as the VMs, switches, folders etc.
Trying out PowerCLI should have a reason, otherwise I don't understand what you're trying to achieve.
Bringing up servers btw. is also possible with a pre-built Template VM and a Customization Specification.
BR
NC