JustGuardian
Not sure if it matters but, which install method did you choose? Like did you try installing using rescueshell or alternate method. I only ask cuz I've had some issues with rescue shell but never alternate method.
I will also say I'ved tried to make several ubuntu based distros for ps4 with minimal success. Most attempts boot with artifacts on the screen making it pretty unuseable, some have the black screen you described, and only once recently I got one to boot with no artifacts (with both itmania's drivers and noob404's pop os drivers) and to actually start it i have to wait for the "press enter for maintenance, press Control D to continue prompt. Then I hit enter and type startx and it will bring me to the desktop only issue is it logs me in as root user lol
I dunno if the first part will be of help, the 2nd part was me just comiserating with you 🙂