Your parents would need to own the house [ meaning you couldn't live in an apartment ], for this to work. That, and you would need money to throw away on a small, custom grow cab [ like, rubbermaid containers ] and some form of cheap carbon air filter [ I know where you can get effective units ], and probably lights, too. The fact is, you need to have some knowledge as to what you're doing. Now, I'm not saying you couldn't get away with it [ I -HAVE- grown in my parents house when I was your age, even younger, and did it successfully without people knowing ]. Bagseed may not be the best start, either --- unless you know how to LST and bonsai good. That means, for people with little vertical grow space, growing in a more horizontally inclined pot and tying that little bastard plant down. A SCRoG would have to be in order, too. I've had bagseed plants whose tops only stretched maybe six - eight inches above the canopy, and be covered in buds. Maybe it was bacause I was flowering with a 100w HPS, don't know. But I do know that from the bottom of the pot to the top of the highest bud was only around 1.8 feet. From unknown bagseed, shwag at that! And it turned out to be some of the best fucking smoke I've ever had. Now, you'll probably have to flower after two - three weeks vegging, depends on the light. But to save space, I'd invest in a low wattage [ 50 - 70 ] HPS system and go for a one plant SCRoG on a near PC grow box scale. It can work, like I said, but TLC will be needed.