How to enable SSH server?

[ryo]

For me it was as easy as do:
On Pinephone:
0. Connect to WiFi
1. Get the Ip doing what @pizzalovingnerd  said.
2. sudo apt-get install ssh

On my computer:
ssh mobian@Pinephones IP

I'll add another step:
3. sudo systemctl enable ssh && sudo systemctl start ssh

You don't need to enable, it just makes sure it'll run on boot.
But you need to start in order to use.