A quick feedback: There are so many newletters these days that lot of people need a strong reason to give their email ID. Substack has a good feature where people can read previous issues before subscribing. Since there is no landing page or preview content, I would suggest to write a few issues before putting it out for the world to see.
That being said, good luck with this project. I will come back and subscribe once I get a feel for the content I can expect.