Nick from the sales team here. Thanks for the question. Currently we don't have a full newsletter creation tool. As someone who worked in the email marketing space for several years, I actually think this is for the best. Building a native newsletter tool when there are no shortage of free and paid email marketing solutions wouldn't be the best use of our resources.
As mentioned I'd suggest using a free tool such as Mailchimp or Mailerlite for basic newsletter requirements. Should your needs be more advanced we do have an integration with Hubspot coming soon that could be helpful to look into.
You can always export your existing member data into a .CSV file for easy uploading to an email marketing software.