Start NoMachine server session over SSH

My host is Windows 10 64-bit. I have a raspberry pi that I do not have direct access to. Neither do I have access to the router it's connected to. I simply use SSH to connect to it. But, I need to change Port Forwarding, and to do that, I need to have access to a GUI. So I am using NoMachine. But whenever I try to do

/usr/NX/bin/nxserver --startsession

I get:

NX> 500 ERROR: Display cannot be empty.

I have found solutions for Xvfb but Raspberry Pi OS uses LXDE.

Xvfb :99 -auth /home/username/.Xauthority -screen 0 1024x768x24 DISPLAY=:99 /etc/NX/nxserver -startsession

(Source: [https://forums.nomachine.com/topic/launch-session-using-commandline-in-with-nomachine-5-ts](https://forums.nomachine.com/topic/launch-session-using-commandline-in-with-nomachine-5-ts)) How would I go about this in SSH using LXDE on a raspberry pi? ------ I apologize if nothing of what I'm saying makes sense.