As an administrator, your first task will be to install NSX in setting up your NSX environment.
NSX Manager is the application that you use to administer your NSX environment. You can use the NSX Manager UI, API or CLI to manage workloads and NSX Edge nodes. In a production environment, for fault tolerance, deploy a cluster of three NSX Manager nodes, each running on a separate ESXi host.
NSX Manager can be deployed either on an ESXi host or a KVM host and this section covers the use of vSphere Client to deploy the NSX Manager virtual appliances OVA/OVF on an ESXi host.
As an admin, your first task is to install NSX Manager as part of setting up your NSX environment.
Make sure that you have the supported vSphere version. See vSphere support.