Link to mine for those who are curious!
I love the idea of your newsletter, I do not run a newsletter but I am subscribed to one.
From a reader's perspective, if you want more people to subscribe, archive of past works and some publicly available articles are needed. In my opinion, newsletter with interesting topics like yours should be archived (and you can compile them later into a zine if you want). I would feel more reassured knowing that the newsletter is quality or legit if I randomly stumble upon your website (who aren't familiar with your past works).
Also, you may be interested in this:
Melon's Community Email Template