NOT A TEACHER!
What is hem? Is it him?
What is me hand? Is it my hand?
No offense, your statement sounds a lot like what those rapper would use in their songs.
If I were you, this is what I would say:
I would like to take this opportunity to apologize you for our misunderstanding. I was not born in the culture where we would physically touch each other when we first meet and that was why I was caught off guard and I did not know what my proper reaction should be. Hopefully, you are not offended and we can move on from that awkard meeting.