Sorry for the late response, just saw this. When I did it last I just used the Docker-OSX project [1]. It should pretty much just work, the readme has a section about on running it on WSL.
If you don't want to use Docker it should still be possible with the OSX-KVM, I've done it before, but I can't remember the exact steps I took to get it running, sorry.
Should also note that I've run into issues with AMD CPUs, Intel seems to work better, but I also haven't tried it since they first added nested virtualization support with AMD CPUs to Hyper-V, so those problems might be fixed now.
