The evolving relationship
Ela Their suggests that you base your plots around the evolving relationship between the main character and the main supporting character:
Act 1: When a character with a pattern is faced with a problem that challenges their pattern
Act 2: Then the main character and their key relationship pursue a goal despite major obstacles
Act 3: Until they step outside of their pattern to achieve the goal and solve the problem
If you are based in New York, consider going to her workshops.