In this social world everyone wants to make good impression on each other. So the best way to make first impression good is SMILE.
P.S.- https://www.123rf.com/stock-photo/smiling_girl.html?sti=msse2lsuuqnzhtbyf5|
So, first impression become good when we give a generous smile to other person. Smile itself means that a person is glad to meet the other one. Have you ever noticed that when we are in a queue or any occasion or any place, a smiling baby always gets our attention and we are easily attracted towards him or her, so that proves smile attracts us.
So, at the end i would suggest you to smile a lot or i should say force yourself to smile and believe me it'll make you happy as well as others you meet daily. Thank you.
