Here are some exercises you should try:
push-ups, sit-ups, lunges, burpees, plank, skipping, dips, rope climbing, crunches, pull-ups, squats.
Do these exercises for a min each. Remember you are not going to get it 100% right the first time. (if at first you don't succeed try and try again.)
Then there are even more exercises you can do: running, sprinting, swimming, and riding your bike.