Look up the strain of the plant if you know what it is. That will tell you how long to take it.
If you don't know what kind - figure another 5 to 8 weeks depending on if it's Sativa or Indica or a hybred...
Learn about watching for the trichomes on the bud to turn from clear to cloudy or amber in color....
You gotta lot of reading to catch up on if you want to dry, cure, - flush the plant before cutting... etc...