Hi there. I'm new to Mothering (lurker)
I've been vermicomposting for about a year now. I bought my first batch of red wigglers online. There are many sources for them, you can just do a search and look for the best price. Earthworms will not compost, just the wigglers. I have 2 bins going right now. I'm actually going to "harvest" the compost later today. (I received my 2nd batch of worms from our elementary school after they did a section on composting - I adopted them.
We're a family of 4 and eat a lot of produce. I needed 2 bins to keep up with us. I just bury the food under the worms/materials and they do their work. I keep my bins in my dining room. You'd never know it, there is no smell. It's been pretty hot around here 90 F - so there is no way they could go outside, plus it gets below zero in the winter. If you can keep them outside, keep them cool and out of the sun.
A great book to read is "Worms eat my garbage." I forget the authors name. It's a great resource. If you happen to get red wigglers in your garden with your compost it won't hurt it at all! I can't get all the worms out of my compost when I'm "cleaning" it, they do reproduce in your bin. The babies are tiny!
Any how, sorry to have written a book. Good luck to you!