I think that if you go into it and use a date of travel within 5 days, you can get most of the way through it. Having OCD tendencies this is what I did in advance.

The tricky part for me was the screen to enter ones DOB. You cannot just enter the dates directly - it must be done on the calendar by clicking on the year , month, and date. I think the calendar starts at a year of 2012 and being over age 60 clicking back month by month for many years was not appealing. Fortunately, I figured out that id you click on the top center of the calendar it will give you a range of years to select from. Otherwise it is straightforward. Have your arrival flight number and seat assignments handy.

Safe travels.