Your target audience is adults 24 and older. Yes your reading level is grade 3? I checked your key messages in MS Word, they are gr. 14;2. so maybe just keep what you have here for your social media posts. Which platform will you use? Tik tok. Instagram, Facebook? Add colorful images if you can. Also it looks like you have 5 references. but one is the handbook, and that is not about grief/ loss.