Surviving a GLA ground school and initial sim is all about your personal attitude and good preparation. Great Lakes school is not tough, but they will throw a big chunk of information at you, which you will have to digest in a brief period of time. Since you are not starting till August, recommend you ask them to send you the 1900 limitations and memory items as soon as possible (you can also get them any where on the net). Get those out of the way before you go to class. If you have no turbine experience, get your hand on any good publications describing a typical turbine airplane systems (get a basic idea). This will help you through ground school. Before you go to the sim, make SURE your instrument scan and instrument flying skills are 1+ or the 1900 will "swallow" you. So do some home work in advance and you will be fine. It's not the best commuter out there, but the best airline school ! Good luck.