As @alxscott said.
I followed the link https://birdslikewires.net/debian-for-openframe and download Ubuntu 18.04 Bionic and follow everything on there but afterwards run of-settings -h to find the commands to autoboot/autologon.
I then followed this link which is a bit different to the above to set up the Chromium Kiosk
I then used this link for the screen saver but the auto boot didnt work. as I put the xscreensaver command at the bottom of the file when it needed to go existing chromium line
This is a lot more work than the above instructions but it may help a little bit