If you are hoping to become a CRNA, both paths would be beneficial.
1. EMT Tr - you learn a lot about the body, more in detail than a CNA does. Each body system is broken down and how it works and what are the main dieseases and truama related injureis that can happen to it and what an EMT can do to stabilize it for transport to the closest trauma center vs local ER. Also you can advance quickly in some states as a EMT, ususally only after 1 year of being a EMT you can move on to become a Cardiac tech , Intermediate, or Paramedic, and in some states a Paramedic is almost equally trained as a RN and same goes for Cardiac tech or Intermiate. You are able to do some more specialized procedures out in the field as a EMT-CT, EMT-I or EMT-P that even a RN or CRNA can't do in the hospital, it just depends on your state and local EMS protocols, check with your local Rescue Sqad or Fire Dept. if they have EMS affilantion.
2. CNA tr - you will learn more about one to one with the pt. and have more of a chance to get to know your pt. better (sometimes)
and this may help as well with you goal to become a CRNA.
Either way you choose having either or both of these certifications under your belt will make you and anyone else a better helathcare provider in the hospital or out in the field.
Hope this helps and let us know what you are going to do. I fyou have anymore questions you can PM me or just post it on the board.
David LPN & EMT-CT -VA