132 fasting is a bit high, as you say, especially after 12 hours. It's not really too bad though. It won't cause complications, I think.
Postprandial is after you eat. You probably know that two hours after a meal you should be below 126 again. But 180 is not too bad either, it's within the target range for diabetics (72 to 180), which means a problem with control but not a loss of control.
You probably know the target ranges, but just to give an overview, here are some numbers for non-diabetics:
Fasting (8 hours or more): 72 to 100, between 100 and 126 is considered impaired fasting glucose
One hour after a meal: below 144, between 144 and 160 is a bit high but can happen
Two hours after a meal: below 126
Highest a non-diabetic can go: 200 (I think that's the point where the kidneys try to get rid of the glucose)
Diabetic target range for control: 72 to 180
I am really not the one to talk about healthy living considering that I eat three foot-long Subway chicken sandwiches for dinner on a regular basis. I also always get two portions of Chinese food.
But it turns out a 20 minute walk one hour after eating does wonders.
I tested yesterday evening (I have a glucose meter and buy test strips, although I have to pay for them myself as the insurance only covers patients), and got 86 (two hours after a few Snickers bars).
(I am not on any medications or a diet or anything. I just happen to have a glucose meter.)