Welcome Mret77 hope you do well in your passport interview.
Trust me when i say if you know your self your family and your local area as you would from living there your be fine
It took us longer when we went to Reading to take the interview to get to Reading and find the office. When the Wife went to take her interview I left her at the reception and sat out side over the Canal.
I had literally wallked out of the office a few paces to the Bridge over a short bridge found a seat sat down when i got a phone call the wife was ok and on her way out
They finished the questions the interviewer needed so quickly that they spent longer with chatting about where the interviewers mother had grown up which was near by where we lived.