There is an outdoor growing section on here to find more info. If you have never grown before, outdoors is a good choice, its more forgiving to mistakes. Than later on you can move to indoors if you feel like it. Unless you are in a warmer area, you really better hurry up, the growing season leaves us fast, especially if you are in the north. If you are going to buy potent seeds from a seedbank, order them now and get your info later, as it takes time to start em too. I would start these indoors though, where you can keep close watch over them. I start mine in cubes in the dark (Ive been using rapid rooters and 100% germ rate this year) when they show the little round caly leaves, I put under a double buld 40w (4 feet) shoplight, 2 bulbs for a total of 80 watts. Than the cubes can be put in larger containers, many use 16-18oz keg beer cups with dirt in them. Once they are established and stable let em get used to the outdoors, sun, wind,etc(do this slowly, like a few hours 1 day than a few the next so you dont throw too much at them at once) Than transplant them. The choice there than becomes, using your own containers, like 5 gal pails or plant directly in the ground. That choice is usually based on what kind of soil you have locally and what the ph is, some areas it isnt suitable for cannabis. If you are buying seed, choose one that thrives in your climate, bagseed is hard in that you probobly dont know anything about where it grows and when it harvests, and thats important, if it usually ripens in december for example, and you live in winter wonderland, it wont have time to finish, so choosing strain is job #1. Good luck.
P.S-evisu brings up another good point (his whole post was good), if you buy seeds, clone your plants before they flower and maybe setup a mother from these clones, make sure you know what plant what clone came from, and keep the one from the plant that was the best in taste, yield, high etc.....Than you can keep a mom plant under the flouro I advised, and next year just take cuttings for your outdoor grow. Cloning isnt hard, if you need advice on it PM me ill send you my basic tutorial.