What kind of school do you need to learn how to do upolstry?

were can you get discounted materials if you decided to just try to figure it out on your own. i want to make my own furiture. chairs, stools, chests, beds etc. but will it end up costing the same as just buying it after paying for your material, wood, varnish, springs, nails, stain etc? so this is kinda a 2 in 1 question... school and cost ...