So you are well behind.
We've had 1809 and 1903 since then.
Can you open the Windows Repair program, uncheck the top box and then select just the two Permissions repairs.
Given the problem of it sticking in Safe Mode, try those in normal mode, reboot and try the dism cmds and sfc /scannow first to see what they report.
EDIT - Use the first three Permission repairs.