Figure out a plan for our newsletter

We have a newsletter signup field at the bottom of our site. Need to:

- Confirm we are storing these email addresses somewhere
- Create a ticket to show a confirmation message when an email address has been captured in our system
- Figure out how I can obtain the email addresses so I can add them to a newsletter tool
- Pick a newsletter tool, maybe Substack since it's both a blog site and newsletter engine?
- Add the providers we interviewed to our newsletter
- Create a content calendar / schedule for the newsletter (monthly? quarterly?)

Open to other ideas/suggestions.