I could talk volumes about pot belly pigs. I've had two and fostered several more, as well as worked with a pot belly sanctuary. I'm happy you want to learn all you can first, because they are NOT like having a dog, or any other pet. As the natural world's 4th most intelligent species (only behind humans, monkeys/etc, and dolphins - although I often question humans being first on this list!), they are often difficult to keep. They have special needs that many people can't give. That's why so many end up in rescue (like many other animals, I suppose).
But obviously you want to learn - kudos to you. Instead of a long post on what to do/what not to do, I will instead refer you to the site of the rescue I volunteered for. Peggy has some great resources there for learning.
http://www.9sites.org/ Be sure to click on the page title, "I want a pig!" A quick list to see if your home is pig ready.
I will say three things: First, please get them from rescue - like dogs and cats, there are so many waiting on forever homes. You can get young ones and litter mates. Second, have them spayed! And early. The older they get the more difficult it is for the vet to spay. And it's expensive anyway. And finally, make sure you have a vet that knows pot belly pigs, not sure any old farm vet. Although on that I will say that my vet is a farm vet who didn't know pot bellies but took the time to learn so he could take care of mine.
Taken care of properlyy, they are wonderful pets. Keep in mind that they can live up to 30 years, so be prepared to give them a forever home for their life time. And, like humans, they can grieve painfully when they lose their piggie companion or their human. Some to the point of starving themselves.
I had Mini Pearl and Black Bart for many years and will never forget them. I would love to have more (I've always had a special place in my heart for pigs, that's why I won't raise one for slaughter, but will cows and chickens), but since I know they live so long, I won't get another one. I'm 50 now and want to downsize and travel when I retire.
Have fun with your piggies!