Currently at my school id say i have the reputation of a introverted 'weird' guy that doesn't do much. Or in some cases i have no reputation what soever. How do i go about talking to more people at my school and going after my female class mates when i'm not really known/already set myself up with this kind of stigma or identification.

I feel like if i suddenly did a 180 people would get really suspicious of me

Has anyone else experienced this, what have been the ups and downs of transitioning?