On Windows, can't run turtlesim despite having downloaded X-launchers

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I'm on Windows trying to run ROS melodic on WSL, specifically Ubuntu 18.04 LTS as that's the only version that supports melodic. Whenever I try to run

rosrun turtlesim turtlesim_node

I always get an error saying:

QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-root'                                              
qt.qpa.screen: QXcbConnection: Could not connect to display localhost:0.0                                               
Could not connect to any X display.

I have tried installing multiple different X-launchers, specifically XMing and VcXsrv. I always get the same error even after starting the launchers up (note that I only had one installed at a time; I didn't have XMing installed when using VcXsrv). Could an issue be that I am not booting up the X-launchers correctly? I don't have access to a Linux machine, so I can only use my Windows device. Is there anyone who can help with this issue? It's hard for me to do anything without being able to see the simulators.