Don't worry about NAI or ME3. Follow your dreams! There will be plenty of corporate, part 135, regional and major jobs available for the next 20 years. Heck, fly for a police dept or look up Global Supertanker!
Do not quit your FD job. Find the best cfi in your area and start taking lessons ASAP. Study for your written and oral online. Start immediately. ...There are plenty of high quality courses available.
Heck think about buying your own IFR 172 and do your private and instrument in it. Build time in it.
Also while building time, get your single engine sea and glider ratings. Your going to have to build time, you might as well have fun doing it.
It's a fun career, don't let anyone talk you out of your dreams!