Interview flights = standby.
Flight to MSP for training = positive space.
I think folks were talking about 2 different things (or maybe my beer and fatigue are catching up with me).
Don't worry about training at Mesaba. The instructors are a very good group of people who want you to pass and succeed. Yes, you will have to work hard, but all the more reason to relax right up until training starts.
During ground school, try to make up flash cards to start memorizing your limitations and memory items. Otherwise, just keep pace with the ground school and don't get ahead of your self on anything else until it comes up. Don't worry about profiles (except just to glance at them, NOT memorize them) until the SIM is very very near in your future.
Remember to take study breaks, and take at least one weekend night off each week.
Good luck. Enjoy.