Yes, you could pass.
As others said, believing in yourself is huge.  But so is your overall physical presentation -- in particular, having no facial hair, and having a female voice.  These are both time-consuming things.  Hair removal generally takes a good couple of years.  Voice training, for me it took six solid months of practice just to find my voice, and another several months to lock it in.  
A lot of us need facial surgery to pass for more than a brief, casual encounter.