First timers usually go after the 40 weeks mark. You could easily go to 41 weeks or a little later. Just be patient. Baby will come when baby is ready.
Statistically, I've read first timers are more often late than early and that chance increases if your having a boy. Just what I've read tho. Not actual info from a doc. My doc told us to have lots of sex, I've also read real pineapple fruit, not packaged or juice, can help. Good luck!
I walked 2 hours a day and did squattimg exercise.