I had the same feeling before I started visiting a 141 girl.
It's easier to just walk straight in the block of buildings rather than keep walking back and forth and thinking to yourself next time when the coast is clear! If you walk straight in no one would take any notice but if you walk past several times people would notice you and watch to see what the hell are you doing making it very obvious indeed.
Once in go straight to the lift and press the button like you've been there many times, and if there are a few others waiting then don't stand there with you eyes facing your shoes whilst scratching your head like everyone's looking at you
I know once you are in the lift you have your fingers crossed hoping everyone gets off before you arrive at your level. If not don't worry, chances of meeting them going back down are very slim
Walking down the corridor for the first time can be a bit daugnting at first especially if there are a few others there waiting. just take a deep breath and walk past them with eyes pointing in the way you are going and you will notice no one will look you in the eye as they are too busy facing the wall or as mentioned trying to look for something on their shoes without bending down
Once you reach your chosen door check she has her sign turned to "welcome" and press the door bell and try not to stand too near the door as they need to see who's there throught he camera and she won't see much if you stand with your face up against the door
Once the inner door opens don't give here a look of fear as this would just scare here to death. Just smile and maybe a "hello" would be more encouriging. i know this can be difficult sometimes especially when the girl resembles nothing like the beauty you'd seen on her profile
Once in the room you suddenly feel much relieved and ready for action
this btw was my first experience visiting a 141. And yes it was worth it in the end