I am about to start pickup but I think I should get my attitude fixed first. I have following two major problems

1. My height is 5'2". So before I approach a girl, my confidence is already shaky. I have been talking to girls mostly under 5'6" only. I am decent looking with some visible muscular cuts. Guys, from your experience does it matter? Usually I talk well and fun guy in my social circle and with girls. But pickup seems to be entirely different as here we express interest very early and girl walks away without even giving a chance.

2. I see lot of pretty girls in office on daily basis, big corporate office but I feel that if I will approach, they will think what a loser trying to pick up in office itself. How can I overcome this mindset of girls if it exists?

1. Get over it.

2. Only talk friendly. Subtle, indirect. Don't flirt unless you are calm and it is obviously on with the girl.