If you are interested in anesthesia I suggest you follow a CRNA or an MDA around for a couple of days and decided what you would like to do. You may find that you don't even like the field. If you decided you do like it, the fastest you would be able to get through CRNA school would be about 8 years (four years college, 1 year working, 2+ years school). The fastest for the MDA route is probably 12 years (4 college, 4 med, probably 4 residency). All of this is assuming that you get accepted to either med or NA school ASAP, which does not happen for many people. One of the main reasons I chose the CRNA route was because of the time issue, but you have to figure out what is best for you