Young adult here, and my text game is zero. I can hold conversation and frame with a girl that is into me or one that is willing to have some decent ( smart ) conversations, however the bimbos are something that I cannot defeat.

What should my purpose be when texting a girl I have never met before? Acting relaxed/not giving a fuck if she is not into me, does not work as I have tried before. Is there anything I am blatantly missing?