have you cut holes for the straw?
If so just put the fire up to the outside, when you see light gray vapors rising off the herb inhale on the long straw wait 10 seconds and you will see more vapor rise,inhale this too then place back over the flame and continue till ganja is finished. Just be careful not to get it too hot or it will start to smoke a bit. Also there odor will be very minimal when smoking out of a vape. GL