Congrats on the interview . I interviewed in DEC of last year . I took about a month personally . However people are dif . I did interview prep for my last gig and eventually did interviews at that airline , then when my United chance came I still did prep. I agree some will go in and breeze right threw it . But most won't without help from outside perspective from people who do this for a living . The business really has changed from when guys interviewed back in the 90's . Prob for the worse in my opinion.
Few free to PM me to get my contact info would be glad to help any way I can .
Best of luck.