You can find a lot of answers to your questions in the FAQs', but what kind of high do you enjoy most? I prefer Indicas which tend to kick you in the ass. Very couch lock effect. Sativas give you more of a cerebral or "up" - energetic buzz. I'm not an expert. In fact, I learned what I know from RIU and the old Overgrow site. But if you're gonna grow indoors, indicas are generally best. I just harvested a couple of Northern Lights and it's freaking incredible. I'm getting calls from friends I haven't heard from in a long time who found out about my grow and now they want to stop by and "catch up", (they really want to smoke my dope). I started another grow last week. Barney's Farms Blue Cheese. As to where to buy your seeds.....You are never guaranteed you'll get them. Customs does take them, (sometimes). It's happened to me 4 times already. They just take out the seeds and send along a letter telling you they removed contraband. You will not go to jail. I've ordered from many places but have had good luck with Nirvana, Dr. Chronic, Dope-Seeds. But the only place I will buy seeds from now is The Attitude. I've gotten every order I've placed with them. Customer Service is great. And, you can track your order. Every seed I've gotten from them germinated and I've had some pretty incredible grows. I'm sorry to be babbling on here. Just Order from Attitude and relax. They arrive quickly! Good luck man. Peace!
PS: Let us know what you end up doing!!