Hello! Your project sounds great - I'd love to take a look at it when you get further.
There is a third-party license, inspired by MB's, which you might like to use: no direct quoting, but you can happily re-present and build on the core mechanics under the license.
If you are on the MB Discord, you can PM me - I'm on there as 1d10+5 or Dewin Ofnadwy!