When I started clinicals for my Basic, I had never set foot in an Ambulance before. Been on my back a few times, but that's a different story. When I first arrived at the station, I asked my Preceptor to show me around the Ambulance. I wanted to know where everything was in case they needed it on a call. I was asked to take vital signs, assist with hanging IV.s, loading the stretcher etc. All and all, it is up to you as too you as to what your clinical experience is like. If you sound interested chances are your preceptors will let you do more things. When we had some down time, I asked them about how certain equipment worked. Take your text book with you, something to do on your down time.
Enjoy your clinical time but remember, it is a learning environment. Take this opportunity to learn as much as you can.