Can anyone recommend an appropriate keyboard for Piper and how /where to connect it?
Any other hardware upgrade options or suggestions?
Any USB keyboard should work. I've used both a Apple keyboard and a kensington keyboard with no problems. Plug the keyboard into one of the usb ports.
as for other hardware, itdepends on what you want to do. Take a look at the official raspberry pi foundations website for ideas https://www.raspberrypi.org
After a bit of research I bought the Logitech K120 USB keyboard from JB HiFi. It was only $14 and works like a dream ️️
Thanks - I just ordered it!