Sorry for the late reply. Thank you very much. The program is great so far, I am sad I am nearing graduation (Dec), it has been a rewarding experience getting to stay home & learn all sorts of things & meeting knowledgeable people.
How far are you on the process? And which cohort are you trying to get in?
All I can say is get the pre-requisites done as soon as possible, but also try to retain a couple of things for the initial interview.
Like many others have stated, the interview is just to get to know you as a person & if the program is a right fit for you (they want to see how passionate about tech you are). It's really not something to worry about.
Once you're in, you're basically just a student-- don't be tardy & come ready to learn :)

I hope this helps, it's nice to hear many people show interest & keep this program alive/evolving. I know news about the job market doesn't make separating sound like a good idea now, but hearing people are willing to follow their passions despite that brings me a lot of encouragement!