I heard that the best time to get some chickies is spring......But it's ok to have some at a different season......
Keeping them in the house......6-8 weeks is right because most problems of poultry keepers are that the chicks aren't kept in a heated brooder(place where chicks live for 6-8 weeks) on their first few weeks of life. You can place the brooder outside, just make sure that they're safe from predators, safe from weather and place it where you can watch over them regularly. But it's better to keep them inside or by the window at least. You can let them outside for maybe an hour every other day to let them have fun but be sure to watch over them.
Types: There are three types of birds: egg layers, meat birds and dual-purpose. Egg-layers are best at egg-laying but not so good at meat, meat birds have high meat quality but are poor egg layers. They are also strong on eating and pooping and they grow fast and usually have a short lifespan because of heart problems. Dual-purpose are those that are excellent egg layers and have high quality meat. Chickens have different personalities depending on their breed; some are calm, sweet, friendly and tame, while some are aggressive. Roosters are generally aggressive at times.
Egg Chickens: Leghorns, Rhode Island Reds and Orpingtons.
Leghorns are famous all over the world for their egg-laying capabilities(300 eggs a year per hen) but they can be quite excited and noisy. They are egg-layers. Rhode Island Reds are one of the most popular breeds in the world: Excellent Meat and Fascinating Egg-laying capabilities. They are great dual purpose birds. They are also friendly and tame, safe for kids. Great breed. And the orpingtons are great dual-purpose birds, too. They lay around 150 eggs a year per hen and great meat quality. They are also docile and sweet.
Pet Chickens: Silkies. They are famous pets because of their calm nature. They are very broody(likes to hatch eggs and take care of chicks), making them excellent mothers. They are also different from the other breeds: 5 toes instead of 4, black skin, flesh and bones, very furry and fluffy, and have down instead of feathers. They do not lay much and their meat looks quite unappetizing because of the black color. But if you want pets, the Silkies are an excellent choice.
Good Luck!