I was almost hit by two (2!) cars while walking in a cross walk at a busy university as both cars were passing school busses dropping off and picking up students at rush hour. I was in the crosswalk in daylight well before both cars started to pass the busses in the oncoming lane with traffic coming head-on at them. The first witch got away without my hand hitting her rear fendor, the second b-tard had to stop hard because I'd had enough and just stood there staring him down, after a few words through his open window he gassed it out of there after I pointed out to him that it is illegal to run over pedestrians, he did get a hand to the quarter panel on his way past as a memento and a reminder that he also nearly ran over my toes when he gassed it out of there.
The bottom line is that life is dangerous. Use reasonable precautions and common sense and don't be overly stupid. For example, when on a training ride if you get behind the pack and they go through an intersection as the light turns yellow and then red, stop for the stupid light because a training ride on public roadways isn't worth dieing over like a SoCal cyclist did several years ago on a training ride.
How dangerous a race is will to some extent depend on you, on the other competitors, the course conditions, and on variables out of your control (dogs, kids, cars, rain, hail, sleet, ice, so forth). You can die on the swim team if you're doing the backstroke and don't keep track of where you are in the pool and slam your head into the wall at full stroke.
The higher your intensity the potentially higher the risks will be. Learn to fall properly, learn proper crash avoidance maneuvers, learn proper ancilliary damage maneuvers if you go down and the following racers don't react in time. Read and study whatever you can find, but apply everything to personally and adjust as necessary.
Your statement "haven't even began cycling yet" causes me some wonderings. Is that "this year" or "ever"? If "ever" then perhaps give it a year before you start racing. Your physical stature and physique may or may not mean anything as to how competitive you are. Perhaps the best question to ask is why is the captain interested in getting you to join? Hopefully not to just use you as pack meat.
Words to ponder, or ignore, at your choosing.