well find something that will make you less of a nerd like an instrument or sport. selling your collection to buy an instrument and pay for lessons is what i recommend, hell start a band and youll get recognition as a musician and not a nerd. dress casually and comfortably. go for a haircut salon or something and ask the attendant who is cutting your hair what would you make you seem like a nice gentlemen or something and get it. find several other things you can do.