Thanks for the info!
Hi Faith,
I was nervous too. I researched the best times to go for a walk-in at my assigned office and a thread I found said 2 or 2:30. Sure enough, I was there at 2:30. When I entered the building someone called me from inside and told me to stand in line if I'm ready to be processed. There was one person ahead of me in line. When it was my turn, the lady requested my appointment letter and ID, she gave me a paper to fill out and asked me to bring it back when done. Took two minutes to fill out basic information: Name, DOB...etc). When I gave her back the paper she gave me a number. I waited five minutes for it to be my turn. A technician came and got me, she was very nice, took my fingerprints, a picture, and entered some information into the computer (the info I filled out). No one even mentioned that I was early. It was a very smooth process.
Good luck to you!