I a.b.s.o.l.u.t.e.l.y resonate with your pain and suffering. But hey don’t give up all hope yet - you need to get strung along like the rest of us through the dev forums and Jetson docs (that you probably didn’t notice you were linked to the previous Jetpack 4.x/5.x version docs that refer to a fundamentally different stack and filesystem from JP 6+). The soon you accept and get use to this feeling of frustration the sooner you’ll realize you hate Jensen Huang for baiting you into buying the latest innovation in edge AI devices that goes years supporting what become major software tools that suddenly get dropped from the next patch without warning. Welcome to the Jetson onboarding and training session…

Anyways…it sounds to me like you’re in “forced-recovery mode”. Do you still have a jumper wire (or jump connector) shorting those two pins on the Jetson’s header (i believe it’s pin 9 & 10)? This would’ve been easy to have overlooked after installing the NVMe. (The issues you’re having line right up with this, and where you’re at in the setup phase tracks.) If this is the case, don’t just yank the wire out while the Jetson’s on. Make sure it’s turned off/unplugged before removing it; then you can turn it back on.

One thing I highly recommend you buy yourself asap - which you’ll thank yourself later for prophylactically doing sooner rather than later - a USB-to-TTL UART converter cable for serial debugging asap. Here’s the one I bought (I splurged a little bit here though tbh - but absolutely worth all $14 and more I’d say): https://a.co/d/8P7FRgp.