Looking for newsletter tips from other creators

Hey all!

I've decided to get back into content writing this weekend, mainly talking about growing my apps and myself as a creator.

I've signed up to Substack and was hoping to pick the brain of folks here who run and have grown a successful newsletter over time. What are some tips that you've found make your pieces more engaging and fun to read? How long is too long, as well?

For context, I created Launching an Indie App back in 2020, which was more long-form. People loved the level of detail, but this time I want to keep it simple with less publishing overhead. (took me 2 days to write + edit LAIA pieces)

Thank you! 🙏

PS: This is the substack I created; michaeltigas.substack.com