You no longer need your MSN to obtain your DNP. The BSN-DNP route has been created. DNAP is different than a DNP, DNP is more credible in the nursing profession and holds more weight if you wish to become involved in academia. You can absolutely apply after one year of critical care experience, I don't recommend it but, if you know CRNA is what you want to do then go for it. Get exceptional grades in nursing school, as becoming a CRNA is becoming more and more competitive. If you plan to apply with such little experience then you will need a high GPA to back you up. I am in a DNP program, did not have the highest GPA but had a pretty diverse and strong background in critical care. I was accepted and now am loving CRNA school and how challenging it is. GOOD LUCK!