Was there anything which made you unhappy, or didn't work well, or were there difficulties? You could identify: what you didn't achieve or do; what or who was unhelpful; what was the reason for any problems; what needs improvement.
How would you summarise what you have learnt from this experience and will do in the future? You could identify: the main points to emerge; similarities or differences between this and other experiences (why / how / what); if your feelings were similar to / different from those in other situations, why, how; what in the future might be the same / different; what you would do next time.
