Forget all of this , you have the device with a big issue with twrp ..
If you're not familiar with fastboot and adb or fastboot commands , you can go until 20.9.24 without issues ..
If you flash the latest rom 20.12.10 then your twrp will change automatically to a new twrp that doesn't support decryption and you will need an OTG usb to flash roms ..
Or else you can boot to a working twrp ( 0623 or 1206 ) , only by fastboot mode and with command ..
fastboot boot twrp.img , and wait 70 seconds to load ..
Flashify can't help you after installation of 20.12.10..