Dear Ralph,
what I found to work perfectly and with minimal intervention was MobaXTerm, which offers plenty of useful options and is freely available.
You can start your WSL instance directly from there and in the background it also runs the built in Xserver. As a consequence you can directly launch any graphical app without further intervention.
The following video shows how to set it up: https://www.youtube.com/watch?v=SZpg5g5O_eY which is very simple.
Cheers
Chris