The factors of attractiveness are by far more related to basic self care (hygine and being fit enough to care for yourself and others), kindness and the ability to share in others' joy, and passionate interest in something, and a lightness or humor in your manner.
I started balding at 18, shaved it all at 22. Its not an issue. Height, hair, etc might get immediate reaction and attention, but hardly matter for real connections.
Good grooming, a good sense of humor, and most importantly, generally being a good person, are what really matter.
As a bald man my experience has been the main determining factor is how hard am I working on maintaining an athletic physique that year.