You can probably check with a local ems training facility and see if they offer first responder training.
I done my FR training that way, only took 6 weeks (2 days a week 4 hours at night) 50.00 for class, 5.00 CPR card, 45.00 for state exam= 100.00 total.
Also we had to do a 12 hour ride along. Then once you pass this go to a driver license testing center and test for a F-endorsement (for hire).
If you know of any private ambulance services that mainly do transport to and from hospitals,nursing homes,dialysis see if you can get with them 1 or 2 days a week to get your feet wet by transporting patients. FYI local colleges might offer this course but they charge way to much and it takes over 3 months to complete.
Rathbone