Hey, I followed the guide to install TWRP. Just step 1, as I didn't want to root. I also installed TWRP as read-only, and then installed the boot.img through TWRP. Did I do it right? Or did I need to give it permission to write to /system? It seemed to install the boot.img without any problems. Can I update the Android version in the future or re-lock the bootloader? Or will that revert the changes?Yeah, because the zip Is not twrp flashable. Go to twrp, choose install, android you should have "install image" or only "image" button on the right, choose that, and select image file you extracted from the zip file