Back in the 80s and 90s I used to be known in the local photojournalism community as the light meter guy. I shot thousands of rolls of film in those days and almost every one of them started with an incident light reading.
You probably already know all this, but metering light levels comes in 2 forms - incident and reflected. An incident reading measures the light falling on the subject. A reflective reading measures the the light reflected off the entire scene.
All in-camera light meters use some form of reflective averaging. Modern cameras have some pretty sophisticated algorithms that work the averaging. Way better than the old film cameras from back in my day. (And BTW, that Bronica is a wonderful old camera.) Even with modern averaging, a reflective reading works best when the scene is fairly evenly lit. If your subject is backlit or you have a very bright background or very dark background, that will cause problems with your reflective reading.
Incident meters use a translucent dome to measure the light actually falling on that dome. If you're taking, say, a backlit portrait, you hold the meter in front of the subject's face and read the light falling there, expose for that and let the background go where it may.
Since you're using a camera built in the late 70s, early 80s, you might think about getting a used meter from that period. If you don't mind analog, the Gossen Luna Pro is bulletproof and can be had on Ebay for $20-30.
In the 80s, we started seeing digital meters. The Minolta Flashmeters and Autometers were the ones to have at the time. If you're looking at Flashmeters, don't buy anything earlier than a IV. I-III used 6 odd button-sized batteries that were hard to find, hard to replace on the fly and expensive. Took all the fun out of those meters.
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My favorites, from left to right. Gossen Luna Pro, Minolta Flashmeter IV, Autometer IIIF, Autometer VF. (I've owned all of these meters and a few more. I still own a Flashmeter IV and the last time I used it was on Monday.) These pictures came off Ebay US. None of the meters pictured were selling for more than $100.