Once TWRP is installed, you can root the device by flashing supersu or magisk root file. First, you have to unlock the bootloader, after which you can install TWRP recovery.
Nowadays, rooting is very simple and can be achieved in a few minutes. In the earlier days, users were afraid to root their device as there were not many guides available and the process was very hard, but now things have changed. Rooting may seem very difficult but it is not.
