How to introduce yourself to strangers in a simple way, I'm not good at expressing myself, I'm not a bad person, I just look like a thief I can't help it

I think introducing yourself to strangers, the first impression is very important, first of all, you need to have decent clothing dress. We can often from a person's dress, you can see a person's personality, so that others have a reasonable judgment of their own, to bring people closer to the distance between people. Secondly, be good at using body language. A decent smile is a sign of acceptance. Smiling and looking at each other in the process of conversation between the two sides can eliminate the other side's guardedness.