Yes, depending on an enlarger printing times from a medium format can be rather short.
Next time you try it, do a test strip:
Set your enlarger on f/22, cover most of your paper except for an 1-2 inch strip
with a piece of cardboard. Set timer at 32 seconds and start exposure. Count down from 32 and at each of the following times move the cardboard to open another strip of 1-2 inches: 22, 16, 11, 8, 6, 4. At 4 seconds just remove the cardboard completely. After you develop this sheet of paper, you'll know your starting time.
Good luck, you are almost there!