Preparing for Enrollment on Arrival

I have been conditionally approved and plan to EoA after my flight to the US next month.

1. Do I need to schedule an interview online or can I just show up?

2. Both my passport details (renewed an expiring passport) and mailing address have changed since applying. Will I be able to update those during the interview?

3. I see a "PassID" under my profile details on the online portal. Is this my "Known Traveller Number"? Do I need to disclose this to my airline when flying?

PS: I'm a foreign citizen on an F-1.