Codex is available on Tabletopia!!!
Bashing vs Finesse is free-to-play.
Full game is Premium (5$ per month to have access to all Premium games or 9$ per month and allow you to invite non-Premium people to play with you).
This is less expensive than a movie ticket or a Starbuck coffee.
I strongly suggest to watch the tutorial: https://www.youtube.com/watch?v=t5zvbd7PH7s
It will help to know the shortcuts and interaction in Tabletopia.
You can find me on Tabletopia here: https://tabletopia.com/playground/players/demojohn-newhouse