Same thing for me. People were like, "your what?" My mother was the only one who was fairly interested in it as she is a retired teacher and had raised chicks/ducks in the class room for years to teach about the life process from egg to adolescent, then would donate them to a farmer friend. I was in the same boat about not knowing what to do as well (city boy). I would get a book that you feel comfortable reading and feels in depth and read up on here.
Just like any pet, the less you care for it the smellier it is. The more you take care of it, the less it smells.
Beware the desire for more though. I agree with those people that say go with as big as your willing to go. If you get in to it, you probably will want to go bigger eventually. That being said, I was happy that I went with the coop that would "fit 4 hens" (really its barely 3, and that's with an extended run area) for about 6 months. I am now up-sizing to a coop I designed and built for 12+. It is great fun, productive, helpful with weeds and pest bugs, a good source of compost for said garden, and also a great source of laughs watching the birds interactions/actions.