Update Galaxy S6 to Android 8.1

Hi - I need to update my Samsung Galaxy S6 to Android 8 or 8.1. I’m watching this helpful video Galaxy S6/S6 Edge Android 8.1 Oreo + Root! [Review & Install Guide] - YouTube But unfortunately I have AT&T (SM-G920A) and at the TWRP link Samsung Galaxy S6 there doesn’t seem to be a matching download for my device. Can I use one of the other downloads listed there?