Ya i follow the step u mention here but the problem is its didnt enter to custom recovery its just go to standard recovery.
It means, you lost twrp recovery. Stock recovery replaces it if you donot delete recoveryfromboot.p file from --root/system/
If your phone is rooted try to delete that file from any third-party file managers which can have root folder access.( Es file explorer or root explorer). Now install TWRP again with adb commands. I hope you could now enter TWRP without any issues. Good luck:good:
Or
After connecting phone to pc, in the command window opened in minimal adb and fastboot folder, type 'adb reboot fastboot' Now the phone enters directly into fastboot.
Flash recovery with the command
'fastboot flash recovery name.img'
(replace 'name' with the name of the recovery image') and boot into recovery as soon as you flash(must).
Now in TWRP goto advanced, file manager, goto system folder and you could see recoveryfromboot.p file. Select it, delete it. And now you can enter TWRP without any issues