Your newsletter is all yours. Unlike with social media websites like Pinterest and Facebook, your newsletter and email subscribers are all yours, and you have their undivided attention. You don't have to worry about some social media algorithm not showing your content to your readers, as they are your email subscribers so you aren't fighting with anyone else to have them see your content.
Hi Sam! I love your site. We should definitely connect. I’m a school counselor and recently launched a site for parents to address pertinent teen topics. Like you, I struggle with the ultimate service I’d eventually offer on my site, but Ramsay’s idea is a great start. He’s absolutely right that people are looking for fresh content for their sites! Best of luck to you and I hope we can collaborate.