I tried installing lubuntu and it would not install on the SBC. Any ideas?
Where did you download it from?
Looking at https://lubuntu.me/downloads/ I see no image that supports the Pi 4.
The pi 4 is armv8-A, where the download page has an armv7 pi 2/3 download, so it cannot use the download currently available needing it’s own compiled ISO (arv8-A having limited backward compatibility)
For more details see https://en.wikipedia.org/wiki/ARMv8#ARMv8-A
I do know Ubuntu-MATE’s Martin Wimpress was working on a release for the pi 4 but I’m not up-to-date on it’s current status, this could lead to other Ubuntu’s support but I haven’t followed the topic very closely.