http://www.pwcca.org/index.html
http://www.cardigancorgis.com/
why don't you check out these two links for information. I have to agree with Emilie, in that you don't choose a breed of dog based on whether they have a tail or not. Do you just want a Corgi because they are cute?
Didn't you say that you are still in high school? What are your parents thoughts on your getting a Corgi? I know you said you are 18, so you are an adult, but you mentioned something about wanting to get a corgi next fall. Isn't that the same time you plan on entering vet school? - that is a lot to handle all at once; just starting college to become a vet, and a new pup entering your life at the same time. Sounds like your parents are going to be doing most of the care, so they should certainly be involved in the search for your pup and which breed will be a good match for your family.