Plymouth is a good place to work from the few people I know from the area. They are a busy company that has a wide range of services.
As for interview help, just be yourself, explain your experiences in EMS, and experiences from previous jobs you've had. Also don't make-up EMS experiences you haven't had. We all had to start somewhere and realize that not everyone has years of experience. Sell yourself on what you can offer to them and above all else, be yourself.