I will add here that it is important to learn and use good metering technique to achieve optimum results. It actually is not difficult to learn, apply and master.
Is it safe to assume assume the "new" (to you) medium format camera uses film? I've found that good exposure technique for film does not necessarily translate to good exposure for digital media. As you play back and forth with these different media you will get a feel for those differences.
You may already be aware of what follows.
It has been mentioned here before, but you might want to learn the old "f/16" rule to help check your meter readings. It goes like this:
a) Set shutter speed at (or as close as possible to) the reciprocal of the film ISO or Exposure Index (EI). This is, 1/ISO or 1/EI
b) If shooting in bright sun, set lens diaphragm at f/16; hazy bright = f/11; cloudy bright = f/8; cloudy dull = f/5.6; run-for-cover-dark = f/4.
c) Shooting over water, sand or snow (and maybe above timberline on open rock), stop down one f/stop from usual setting for the light conditions.
d) Backlit subject, open up 1-3 stops. Shaded glades, open up 2-4 stops for shadow detail. Open shade (with good skylight) open up 1-3 stops. In all cases, bracket and pray!
Learn about reciprocal exposures.
Note that each full f/stop change in exposure lets in exactly double or half the amount of light, depending on which way you go. F/2.8 lets in twice as much light as does f/4, for example. Full stops are f/2.8, 4, 5.6, 8, 11, 16, 22, 32 ...
Same works for the usual range of shutter speeds (or closely enough to make it a usable system). Usual speeds would be 1 sec, 1/2 sec, 1/4, 1/8, 1/15, 1/30 (or 1/25), 1/60 (or 1/50), 1/125 sec, 1/250, 1/500, 1/1000.
So, if you start at, say, 1/125 sec at f/8 ... an exactly equal (reciprocal) exposure would be 1/250 at f/5.6, or 1/60 at f/11. You can take it from there.
Now you know everything I know about this stuff.
Have fun with the new medium format camera. (What flavor and brand did you get, anyway?)
G.