Either way is fine, it’s actually a little easier with TWRP, in my opinion. If the recovery is /e/ foundation software, then you probably have a Murena, if it’s TWRP, then someone installed /e/ OS on a stock phone. If you go to “Developer options” and enable “Advanced restart,” you should be able to reboot directly to recovery by holding down the start button and selecting restart then recovery.
One way to get an idea of which kind of installation you have is to boot to the recovery software.
Hypothetically, you shouldn’t be able to tell the difference, and it shouldn’t make much difference for rooting, but I did have to root my Murena slightly differently from the method discussed here. You should now get a prompt for locking your bootloader on your device. Although, the first command given above may work too. Note: For devices released in 2015 or later, use the ‘fastboot flashing lock’ command. fastboot oem lock OR fastboot flashing lock. I think you could have two things if they have /e/ OS already: they’re either Murena, like mine (in which case /e/ foundation has already unlocked the bootloader), or they’re true stock (like you would get from Teracube), where someone else has installed /e/ OS aftermarket (but would need to unlock the bootloader first). Now issue the following command to relock the bootloader.
