Your question is answered in the link in my signature, and in the outdoor grow tutorial stickied at the top of 'outdoor'.
Cover them at night only if a frost is predicted.
Only water in times of quite dry weather, which I hear is not common in your area Plants like to dry out a bit, but not to the point that they wilt. You will get a feel for this. IF you see the old lady down the road watering her rose garden, run home and water your pot plants. If you see her spraying for fungus, do the same. Oddly enough, roses and cannabis require very similar treatment outdoors. They suffer equally from powdery mildew and bud rot problems caused by wet weather and not enough morning sun.
Harvest in fall. That is covered in the link in my signature.
Don't give your bank card info unless you really enjoy serving afternoon tea to the town constable. Send cash instead, or a money order. Have the seeds sent to somewhere else other than your home.