You have a good gpa so the class wont be an issue. You don't need charisma for the interview. Most schools I've applied to interview based on clinical questions, which you will either know or you won't. It seems in my opinion they aren't as interested in the personal questions, they want to see what you know about cardio/pulm, hemodynamics, vents, etc. My advice would be transfer to a busy ICU, preferably a CTICU or SICU where you will frequently have vents, invasive lines, titrate drips, multi-system dysfunction/failure. Make sure wherever you go, you are learning from your patients not just coasting through shifts. If you want to start preparing now study CCRN, its a must for CRNA school with how competitive the schools are. Get as many certifications as you can: ACLS, PALS, CCRN, TNCC, CRRT, NIHSS. Also try networking with the midlevels/physicians early so you have strong letters of recommendations, plus you can discuss patient cases with them to learn. Also it would be good to start shadowing sooner than later, find a board certified MD for tougher cases such as cardiothoracic surgery, you'll learn more there than the easier cases. Dont underestimate the GRE either, many schools wont even interview you if your GRE is below their minimum standard. Good luck!