Tips for starting a charity stream?


I apologize if this isn't where this should go...I don't think it is but I had no idea where to put it. On my channel I am primarily going to focus on doing art, teaching art, and doing some gameplay. One of the main things I want to do is charity. I know I'm basically buying the saddle before I buy the horse here, but when the time comes that I do get several thousand subs I really want to do charity events but I have no idea where to start. Specifically I'd like to do charity for law enforcement as that is what I used to do for a living. Anyone have any tips they can provide me?