Fork this repository.
The GitHub documentation might help if you are unfamiliar with GitHub flow: https://help.github.com/en/github/collaborating-with-issues-and-pull-requests/github-flow
Download Hugo binary or install it as described here
git clone git@github.com:*YOUR_USERNAME*/website.git
cd website
git submodule update --init
hugo server
open localhost:1313
hugo new episodes/TITLE_OF_SHOW
More details creating a pull request from a fork