Here is the simplest playbook that you can use and when I mean that this is simple, it is borderline basic if not less
Weekly Newsletter
TRIGGER
Run weekly newsletter
INPUTS
1. Brain dump
Or
2. Information that is going to go into the newsletter.
# STEPS
1. Pick the topic
2. Outline the newsletter
3. Draft the newsletter
4. Edit for brand voice
5. Write the subject line
OUTPUTS
Drafted newsletter.
This is the exact newsletter outline that, shared during her talk and this will still work. In fact you can even increase the steps and it will even work better