[re] I'm afraid of striking another person. What should I do?
Let me tell you about you question.
Everyone is afraid of striking another person.
That fear comes from two ways: one, from him, and the other from yourself.
The fear from him can be overcome only by hard and steady training.
If you train TKD in hard and reasonable way that most people cannot do, you can be sure to control another with technique.
The fear from youusefl can be overcome only by indignation.
True indignation can make you use leathal techique in spite of your moderate personality.
And the indignation comes from true love.
Sometimes fury can make similar effect, but you should not be confused with them.
There are more to explain about it, but let me stop here.