Download the rom from there official website follow they procedure to flash this rom, rom should be flashable but risk if you dont have any idea of flashing custom rom mostly people brick there devices brick is like dead or half dead phone so be carefull must read full procedure then flash and sometime imei or signal gone so read how to restore imei and signal issue i post that procedure few days back seach it, and if you cant flash this rom i already post how to flash stock rom so flash it back if you cant flash this, need rooted devices bootloader already unlock and wr or trwp install
Need a rooted phone with custom recovery install