Long story short, I was trying to get TWRP on my Moto G6 but am unable to boot in any way.
fastboot boot twrp.img
Results in the phone hanging with the Motorola logo. I'm guessing that this is relating to me flashing the recovery before-hand instead of booting it first. I'm not sure, I'm new to this.
When I try to boot into recovery from fastboot it presents me with the fastboot screen once more saying "Start Up Failed" with an error "Failed to pass validaton [sic], backup to fastboot".
For the record, the normal mode boots up fine, but I don't really care for the phone if I can't get TWRP running on it.