Hello and welcome!
Have a very short moment before having to run, but my view on this? Work out the divorce with your husband first before pursuing poly. There are a few ladies (and probably gents, too!) here who have gone through divorce from long monogamous unions and are now actively in the lifestyle. Are you in your heart of hearts just looking for something that would trigger your husband to initiate the divorce, and save you from making the final decision?
Me: bi female in my twenties