It sucks to get rejected. I have been unemployed? for a long time now and for over a month I was applying to at least one job per day. I got so many rejection letters it wasn't even funny. I also got a few interviews and an interesting reference from a former employer, who then refused to verify my employment for my current employer Disney English.
It is very important to keep your confidence up. I never drove as a CP as a part of my job as a Character Attendant. However I was hired for transportation, I just never did that job. Many people who are CPs they don't drive there are busses for you to take and they make it very easy to get around with out having to drive. It wouldn't be something that I would bring up in an interview, that you are not confident driving, unless they flat out ask you.
Any experience is better than no experience. But, no experience is necessary. As a CM at the parks you are there to make magic happen but really blend into the surroundings. You have to be confident that you can make the right decision at the right time, with out a leader to make it for you.
Think positive thoughts about yourself you can get this job. Apply again, if you want it. I have applied so many times for Disney English and I am just now going.