Ask HN: I'm designing a board game. What resources would you recommend?

I have an idea and early prototype for a board game I'm working on, but this is the first time I work in this medium. The game is designed to have elements of strategy and luck, but also to be educational so that players learn over time and improve their skill.

I want to make sure I use good design practices so it is fun and playable with different numbers of people across different skill levels etc. What resources would you recommend to someone trying to learn and follow best practices in board game design?