Advice on guide dog interview

Hello to all, I am a second year student, and I just recently applied for a Guy dog in January. We are scheduled to have a guide dog interview, and I am not sure what to expect. To preface, I am in South Africa, so I know that every story will differ, but anyone who has went through the Guy dog interview stage, please advise me on what to expect, and what to ask the school. They will be coming to my university, and do the whole speed test and mobility assessment. Also can anyone advise on how long after the interview could I expect them to contact me for a potential match? I appreciate all of the replies in advance.