I would like to volunteer for helping test your game as well. I am new here, but have been playing RPGs for going on 30+ years and have play-tested many different types of games in addition to RPGs.
This project, with all its secrets and mysteries and such, sounds right up my alley.
I can provide very detailed feedback. I can do a thorough breakdown of all areas of the design or just focus on one aspect. It's up to you.