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I was given a Hasselblad 500cm from a friend that has sat for months on a shelf in my living room because I don't have a light meter, and haven't had the courage to take a stab at guessing exposures without one.<<
Months?? Impolite though this may sound ... Seriously, chief, your priorities are in the wrong order. Guessing exposure requires practice, not courage. Load up some Tri-X, use the sunny-16 rule, and just do it. So you mis-expose a few frames. Who the hell cares? That's how you learn. You don't have to show anybody the contact sheets.
Guessing exposure with print film shot outdoors is about as difficult as driving a car with a stick shift. With a little practice, anyone can do it.