I’ve been searching for something just like this and haven’t found ‘the one’ yet.

Something that goes from goals to milestones mapped to specific days and times on those days (I’ve learned that todo lists not mapped to calendars are far less productive).

Amazing Marvin comes close when you customize it a certain way, and their recent ‘Goals’ feature is well implemented, but it’s not ‘purpose driven’ to do what you’re describing.

Would be interested in following your journey on this if there is an email list you’ve created to subscribe to...