If you're planning to install Magisk, your botloadee should be unlocked. Why bother with this old solution? Use a fastboot command to flash a TWRP recovery image to your FOTAKernel partition, enter TWRP and install Magisk. You should have root access right away
I have been trying hard to research on this. Magisk requires unlocked bootloader but my 5833 is Bootloader that cannot be unlocked (as indicated). So I was trying to access 575 to allow me to install custom recovery. No?
JJ