I found another post which you helped another user
After a day of research, I learned enough Linux commands to be able to use the command chown -R myuser /var/lib/plexmediaserver and added the myuser to have Read-Write access. Plexmediaserver is up and running. I didn’t have to go into the override.conf file, thankfully, because I don’t know enough yet to know what to do in the file.
