Great place to start. Read the FAQ's and don't try to get complicated at first. Best way to learn is by doing so start a SMALL grow and learn from your mistakes. That's what I'm doing.
Using simple bag seeds I started with 2-3 plants at a time which ended up being 1 or 2 females. Now I'm doing 4-5 females (8-10 plants started) at a time. When I get a mother plant set up of my first crop of good seeds (currently 2 weeks old) I will bump it up to 6 females a month from clones.
What I looked at is this, "How much weed do I WANT to smoke?" I currently smoke about an ounce of crappy weed a month, more like two weeks if we have a long weekend or my girlfriend is out of town or there's something good on TV or it rains or the sun is out... OK, so 2 ounces a month.
So, I want at LEAST twice that much so figure 4 ounces a month. I can get an ounce off one plant easily so six plants should give me at least 6 ounces. Doing that I can put two ounces away a month to long cure. I will slowly build up that stash to about a pound then I'll cut back to 2 or 4 plants every 2 months but I will make them monster plants; veg for 3 months then flower for about 10-14 weeks.
So, what's YOUR plan?