Private EMS on a 911 scene

I am a basic with a year of experience at a private. Today, me and my medic partner happened upon a MVC involving 3 vehicles. We checked out the two individuals who were still in their vehicle. FD showed up a couple minutes after we got there, and had us collect information. Only one ended up being transported. However, it was my first real 911 scene and I had truly no idea what to do. Was there anything else I could have done or anything I could improve on for future instances. Thank you!