To to find your IP :
SSH in from another machine, and follow along from https://bugs.launchpad.net/ubuntu/+source/bluez/+bug/1492441/comments/7
sudo bluetoothctl -a
#enter pairing/discover mode on the keyboard
#wait for keyboard to appear
[bluetooth]# connect CC:C5:0A:1F:E5:2E
Attempting to connect to CC:C5:0A:1F:E5:2E
[CHG] Device CC:C5:0A:1F:E5:2E Connected: yes
and can enter
The connection is remember across reboots.
This should have worked, but didn't:
You'll need a USB keyboard, not a mouse.
Alt-f2 - lxterminal
follow https://www.raspberrypi.org/documentation/configuration/wireless/wirele… to set up wifi
apt install blueman
tab to adapter, preferences and change to always visible.
enable the keyboard, and press search on pi, then select it when appears, and tab back to setup.
set passkey and complete pair