Community newsletters are hard to get right.
They often become an automated digest of irrelevant activity no-one is too interested in reading about.
The newsletter needs to be a curated selection of content from the community which is easy to scan for something interesting.
I quite like The Overflow for its simplicity here (this is primarily distributed by email).
The trick is to keep the signal to noise ratio as high as possible.
If you don’t have good enough blog posts or questions this week to share, don’t share any. Or hold back sending a newsletter until you have high-quality content to fill it.