You shouldn't have to worry about pranks if you assert yourself from the beginning. If someone gives you an order respond appropriately. My favorite line is "Do I look like your bitch?" If you make a mistake and someone tells you the right way to do it, just say "I know." Personally I love it when a newbie tells me that.
If you don't like the way your station does something make sure and point out "that's not the way we did it at Mooseknuckle VFD ." I am sure they will change their policies after that. Also Paramedics tend to get big heads so make sure you point out that "Paramedic save lives, EMT's save Paramedics." I'll tell ya I never get tired of that classic T-shirt line.
Finally make sure and buy everything you can that says Firefighter or EMT. T-shirts, belt buckles, underwear, watches and of course your own personal jump kit. Galls is always a good source.
Good luck and welcome to EMS. :wink: