Wow, not too much more for me to add here! If I repeat something from Keljonma's post, sorry.
I originally bought worms through the mail and they multiply like crazy if you feed a lot of kitchen scraps and crushed eggshells. They are the same as what you can get at the bait shop or small groceries' refrigerator case. Nightcrawlers do not live in bins, they go 6' down into the ground. Red Wigglers are what you want, which are hybrids.
I bought those big plastic storage bins like the recycle bins and drilled many small holes in the sides and bottom. I have 5 now because they reproduce so quickly. Lay the lid on top.
I've tried shredded leaves as the main medium but they stuck together horribly. This is particularly bad when you go to sort them. The best is peat moss by the bale with loads of shredded newspaper. Wet it good with WARM water before adding the worms. I fill the medium to the top of the bin with no problems, 18". Add some dirt which the worms need as grit to digest their food. Mix in your scraps, with some on top. When you change the bin save some of the compost to add to the new bin.
The bright light never worked much for me when sorting worms from their compost. I sort on a large piece of plastic on a picnic table. I throw the large pieces of newspaper, and uneaten food that they left into the new bin. Originally I kept them in my kitchen but in good weather they live outside up on pallets in the north, cooler, shady side of the house. I put heavy boards on top of the lids to keep raccoons out.
They love apples #1, coffee grounds and eaten corn on the cob. Don't give citrus, or raw potatoes which sprout.
As a note: I put tons of leaves and pine needles in my chickens' pen all winter to keep the mud down. They compacted it over with dirt. All spring each time it rained there were hundreds of worms that came out from under this stuff and the chickens ate their fill each rainy morning. I just now tilled it and they thought they struck gold all over again. So you can try that, too.