Internet is the default path out. Private networks are extra.
A first server attaches to Internet on the create form. That is how it gets a public IPv4. You do not create that network on this page. See Creating and Managing Virtual Machines.
Cloud → Networking is private networks, ports, routers, floating IPs, load balancers, and security groups. The firewall how-to is Using Security Groups.
The Networks tab lists networks you created. A new project can show No Rows To Show. + Create Network adds a private network when you need isolation (app vs db, or a network that is not the Internet). Subnets and routers live on those networks after you create them.
10.0.1.0/24.Skip Internet on the VM and you will not have a public SSH path unless you add another route later.
The server page has Networking. Overview already shows the public IPv4 and Network Internet. Extra interfaces show up there after you attach them.