Kudos to you for taking the pig in, and congrats on your new find!
We have two pot-bellied pigs, and it took some adjusting with our other animals. The pigs are friendly towards every animal species we own. However, two of our dogs and three of our horses, cannot be trusted with them. They get along wonderfully with all our birds, but must be separated for feeding, and pigs need special pig fencing. Ours were known to destroy fencing to get into pens if food left out. Also could not leave them unsupervised around the house because they'd root my yard and flower beds. So we ultimately built them their own yard.
Basic needs: food, water (we use large shallow black rubber bowls), a warm dry shelter with lots of blankets and straw bedding, a mud hole in summer, and preferably access to yard with good grazing/rooting. They do not need a lot of grain (our guys get 1.5 cups 2x per day, per pig). Greens/roots should be main staple to diet (weather permitting).
Oh, one other thing.... they need their hooves filed down. Some people use cinder block pavers or gravel. We use a pig farrier once a year.