First do the program that everyone does for Delta. Next, if you are weak in actual interviewing skills I wouldn't count on one meeting with Aerocrew to prepare you. Look for a place that is willing to work with you multiple times and really take the time to hone your skills and build up your confidence. Emerald Coast also only does one meeting with you one on one, that might be enough for some people and it helps to learn from watching other people in their group meetings. But, again, if you feel like your interview skills are lacking then go to a place that meets with you multiple times one on one. It will help tremendously with your skills and confidence. There is a pilot at American that will do multiple calls with you and get you thinking about your answers, Jeff I think is his name, do a search. The place that does a lot of United prep in Denver does a great job in the actual interview prep. Despite working mainly with United people they still have people that specialize in Delta-centric interviews.