Hello,
Thanks for reaching out! This is an interesting idea.
Unfortunately this would involve quite a bit of custom coding, which we are not able to assist with per our forum guidelines. However, I would recommend starting with our themer’s guide and functions list as a starting point if you’d like to give it a shot.
Alternatively, you might look at using a third-party plugin like this one to automatically notify users of new posts.
I’m sorry I don’t have a more straightforward solution for you here, but please let me know if you have any questions.
Thanks,
Jennifer