Well there is a difference between growing a little, also growing inside and outside is a major difference.
Going all hydroponic with 600watt lights, ventilation and various groth hacking is a third and totally different way. I alwaays have 3-5 plants in the house, all year. They smell A LOT, so lemonhaze is a good smelling plant, where as OG kush is not so nice odor for many visitors. My fav strain is white widow.
I've grown 3 plants so far, just know this plant is very strong and is hard to kill. Yes if you screw up the yield might be lower but you cant kill your plant easily.
I'm actually in the midst of growing my own plants. It's honestly not that hard to do but you need to do it right. unless you're growing outside get or make an enclosure, get proper soil, proper nutrients, proper lighting, the whole shebang. You can buy seeds online all over the place because they technically sell the seeds as novelty items but in reality they are 99% going to sprout. Google is your friend!
Depends if you're planning on growing inside or outside. If you're in an area where it's illegal it's going to be much harder to do. Also try and find out what strain it is that you would be growing. Different strains have different yields and plant sizes. If you're going to be growing indoors you can't have anything too large, and definitely cannot have a lot of them because of the heat signature your house will put off. Law Enforcement agencies around the US have been known to fit aircraft with thermal imaging cameras to find grow operations from the air. You have to be veerrrryyy careful with this kind of thing.