The best way to find out is to enter a race (or 10).
Seriously, train, study, learn some tactics and jump in. Worst case scenario is you get dropped, but you'll have the experience.
Also, most areas have weekly training crits where you can jump in and out of the race - ride til you get dropped, catch your breath, jump back in for a few laps. Those are great ways to learn race strategies, develop technique, and build your form.
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Formerly fastest rider in the grupetto, currently slowest guy in the peloton
