Here are some handy links (for me) that might help you out too:

https://nim-lang.org/blog/2020/10/15/introduction-to-arc-orc...

https://www.youtube.com/watch?v=aUJcYTnPWCg

https://github.com/stisa/nwasm

You can also go an Emscripten route: https://hookrace.net/blog/porting-nes-go-nim/