#1 looks way too contrasty, #2 still a little contrasty. #3+4 seem to have optimal tonality. Maybe the exposure was off in the first picture?
Apart from that they look pretty good. Keep shooting! Which Developer did you use?
It's difficult judging images on a screen when the scanning could have had so much to do with things. I'd agree that the first couple look a bit contrasty but whether that's the negatives or not is impossible to say. If it is then I think you need to give a little more exposure, maybe a stop, and cut back on the development by, say 15% for starters. But hardly any of us get things right straight off the bat. The important thing is that you've proved to yourself you can handle medium format and you'll now keep on buying film to make sure it hangs around as long as possible. Wont you!!