Right now users can subscribe to my newsletter only through an article. If I want to directly share a newsletter link page for my blog, currently that's not possible. If every blog can be provided with an out of the box newsletter page, that would be really cool!

And also if I can put a custom message within the newsletter box, that would be useful too.

Something like:

"Welcome to my blog. If you like AWS, Freelancing and Coding, it's possible that you'll like my articles too. Subscribe here!"