If nothing was unclear or difficult, say so. Skip questions about steps you did not experience; use not applicable where appropriate.

Which convention was unfamiliar?
What introduction helped you settle in?
What information would help before arrival?

Author notes / illustrative keys where applicable:
1. Use this answer to locate the part of the experience that needs explanation. The example issue to investigate is: first-time attendees do not understand session booking rules.
2. A useful introduction identifies the orientation context a newcomer lacked, such as the event format or help route. Preserve that practical aid, without assuming all first-time attendees have identical familiarity or preferences.
3. Turn the requested improvement into a testable next step. One illustrative action is: add a first-time visitor guide.