Suggestion: “Are you sure” pop-up

I’m using your plugin in a site targeted to elderly people, so they can post from the front end to a private group site. Since they’re elderly and get confused easily, access to the WP Dashboard is restricted and they can’t edit or delete their posts.
Is there any way to add a message such as “Are you sure you want to proceed?” to prompt users to double and triple check if their post is done correctly?

Thanks in advance.