The scar would be right along the bikini line. (right where the top of your undies are) They cut in that area, lift your uterus out (it's still attached to you, don't worry!), cut open your uterus and take all the fibroids out through that cut, then close your uterus, put it back in and you're healed in 2 weeks. Recovery time still varies, though.
You'll be under a general anesthesia. You'll be asleep and not feeling anything. Upon waking up, you'll be given a strong pain-killer for the first two or three days, then the strength of the pain-killer will gradually go down to extra strength Aleve or Tylenol (non-prescription).
After healing, do not expose the scar to the sun for at least a year, and put lotion on it each day (after the stitches are out!).
Your doctor should also write a note to excuse you from all PE classes in school for at least 2 weeks. Any straining, and the stitches on your belly could and will burst, and you'll be wide open again.
I've had stitches in my perineum three times from births, and I know all about the risks of bursting them, the recovery times, the pain-killers, etc. But I haven't experienced an operation. Your doctor needs to talk to you about this, and since you had to ask on the internet, your doctor's not a good man. He didn't care about telling you of the surgery. Switch to a female doctor. They care more.