Is it weird ?

My friends say I need to put myself out there if I want guys to notice me but I don't know how to do that ? I don't like when girls do too much for attention. I've always been extremely shy when it comes to men. Is it wierd to talk to someone on Facebook or make the first move in general? Im only asking about FB because it's guys I see sometimes that catch my eye, but I never say anything because it's not a dating site and I don't even know what to say to "put myself out there."