photos won’t show up

My page is https://nmsperforms.org/orchestra/. This is just a list of news posts. When I make a new post, I put it in the Orchestra News category. When creating the post, I add images. When I go back to the main page, the images are not showing up. I am a total novice with WordPress and need specific directions on how to fix this so my posts show up with their photos in the news without having to click on the post title. thank you!