Go for it man.
Growing for yourself is great fun and if you can make a profit, well that's the American way right?
However, beware, it's not as easy as it sounds or as profitable. A quick peruse of any growing books, I recommend Cervantes, and you'll see that's there's a lot more to it that dropping a few seeds in a bucket and trimming up your award winning buds.
Hook up with another grower to get started, that's what I suggest.
Good luck, Primo