Answer:
Personally, I would have joined the American Revolution as possibly a soldier or maybe a medic, because, although I would be risking my life as an estimated 6,800 Americans were killed in action, 6,100 wounded, and upwards of 20,000 were taken prisoner, I would still be helping people, and that might make the current scales of deaths, wounded people, and prisoners from the American Revolution go down.
I've always wanted to help people and prevent death so I believe going back in time to join the American Revolution would be the perfect way to fulfill my dream.
Also, if I were to join the American Revolution and I already knew all of the English's plan, I would be able to help America plan unexpected hits on the English-men- possibly helping America win even faster than seven years, which was the initial time that it took George Washington to lead America to victory.