Black screen recovery

[zemartinez10]

Hey good night i need help please i was using pixel experience 11 on my OP5T but i want it to get back to stock so i go to twrp recovery and try to flash the OOS 10.0.1 and i got zip trebble error, i decide to flash the recovery image first to see if that was the problem and installed ok but after i reboot to recovery only show black screen i can enter to fastboot but i dont know if i have to lock bootloader and install stock recovery from cmd and the install the stock OOS.... any advice please