relationship

I am 23 years old I never had a gf before and never tried Until I entered university I noticed all around me have gfs constantly So I tried to get one but for the past 2 years all my efforts didn't work Which caused me to have doubts that I may have a flaw If anyone experienced this before what's your advice to me ?

I am a doctor undergraduate i need to talk to a girl any one who i like at first sight (I've never entered a relationship with a girl never talked to a girl comfortably) I can't start a conversation Too shy to start Don't know what to do please i need a solution