I wanted to share with other noobies that I paired a blutooth keyboard with my Pine64 running Ubuntu Touch and it was able to type to notes and the web browser without any problems. I did not try terminal but it should also work. Hope this helps.
Have switched to Arch linus (Phosh) on the pinephone and have ordered a new bluetooth keyboard with a mousepad. Found that highlighting files for cut/paste operations in terminal would be facilitated using either a bluetooth mouse or a trackpad attached to the keyboard. Hope this helps. Really fun learning more about this device.