The point is to appeal to them for the freshman class. The “today” you. It’s unlike high school where a writing teacher wants to see you reach deep into the secrets of your past.
You don’t get an admit because you had family issues. They’re looking for strengths and traits that they feel apply to college life. So some stage fright issue could work IF you can “show” how you became a more activated person, reaching out, bolder in choices, even compassionate actions. In this case, it being middle school would just be a point of reference, a few lines.
But you haven’t mentioned what target colleges. The more competitive, the less comfortable I am with writing about indecisiveness. While self awareness is good, waivering would be tough to pull off without sounding, well, indecisive.