My frist O.D Grow in NH.. a few questions

hey whats up everyone thats reading this. Well I have my seeding already started indoors so that way i can sex them. My Grand Pops (Old Time Smoker and grower) gave me this seed and said that it a good strain and i have no idea if its a Sativa, Indica, or F1 (but i doubt the F1). well i dont really know when i should sex them (when to start..how many internodes) then to put them outside and to transplant. I also want to know if i should dig a hole in the ground or just use a 5 gallon camo Bucket from Home Depo and modifi it a little bit. My grow area isnt to big but its enough to keep outta the Human eye. but here are some pics of the seedlings. there about a 1 week 3 days old. sorry about the low quilty of the pics.