I failed, I also tried to directly flash the patched boot file of magisk by using the bellow command...
fastboot flash boot masgisk.img
(Note: I tried both boot_a and boot_b, none of these worked)
I once again failed...and when I tried to check if the bootloader already unlocked by using these commands...
fastboot getvar all (not worked)
fastboot oem device-info (not worked)
Upper commands returns only
OKAY [process finish time]
and I also want to mention that Fastboot and Adb both can recognize my device I also installed the usb drivers and adb drivers, Usb debugging and oem unlock is turned on.