Create a user
On each User creation, a keypair is generated and user's public key is signed against zinn's certificate authority.
Create a client
You can create a client or accept an invitation from another client. If you're the first user of a client, you have the owner role by default.
Create a vsite
Vsite stands for Virtual site. A Vsite creation is a way to start a coherent cluster. This cluster belongs to a sitegroup, defined by some rules (redundancy of "real" geographical sites, ....).
Create a machine
Like in a store, pick exactly the resources you want (number of cpu, architecture, memory, ...) and attach many services (interfaces, storages...)
Create a network interface
You can configure your reverse DNS for each IP attached to a network interface. Vlan are easy to setup too.
Attach machine writable storage
You can also try multiple attachment of a storage, then many machines share the same one :)