If this is your first pregnancy, you may take your time. Some mummies I know will shower, eat and change before going hospital. They will monitor the frequency of contractions. If it is from 2min to 4mins, they will immediately go hospital.
Usually first pregnancy will take pretty long to dilate. However, some hospital will advice if you are 3cm dilating, waterbag break like a week or two after check up then you should immediately go to labour.
If you are unsure, do call labour ward to check.
For me, both pregnancy 3cm dilate . Second pregnancy I had mild contractions but I endured more than 12 hrs until I am admitted in labour 😊 Both pregnancy were at different hospital hence procedure was different. Also both exceed EDD.