Question about creating a VPC using the CLI

I was reading documentation about creating a VPC using the CLI and it made me realize that I must not understand the environment correctly. It seems to me that in order to use the CLI I first have to create an EC2 instance (which as I understand, gets created in a VPC), log into the EC2 to access the CLI, then use the CLI to create a new VPC. Is this a correct assumption? Would the new VPC be a child or sub component of the VPC that the EC2 belongs to?

thanks