I've been braintanning and teaching braintan for a while. I've done deer, bear, coon, otter, fox and egg tanned several deer skins. You can still salvage what you have, but I would bark tan the pig. Never tried pig, but, as deersled said, I've heard it's almost impossible to braintan.
First you need to soak the deer skin. If you're not using lye, soak it in fresh water (no chlorine) for a couple of days (depending on temperature) or until the hair slips easily. If you can't soak it in running water, change water at least once a day, preferably twice a day. You want bacteria to break the grain down but not so much that the skin is falling apart and it's a health hazard. I got staff once from scraping too ripe skins.
Then you scrape the hair and grain off. Don't pull the hair out first or you won't have a frame of reference for what's already been scraped. It can be really hard to tell if the area you're working has been scraped. Lye makes it easier to see, but it's still hard. If you don't get all the grain off, don't worry about it for your first hide. You can actually tan it with grain on (or hair on). It just won't be as supple and it will have a slick full-grain finish instead of the suede-like texture that good buckskin has.
You can work on the flesh side, too, but it's not necessary. It is helpful to hit it a few times with the scraper to break the membrane up. You can also sand some of the membrane off after you've finished the skin.
Once you've scraped, wring out the skin well. This is the hardest part. If you don't get enough moisture out there's no room for the brains or eggs to penetrate the skin fibers. You can get details for wringing on
http://www.braintan.com.
Then soak your moist skin (not too dry and not too wet) in your warm egg solution working and stretching while it's in the bucket. Do this for at least 15 or 20 minutes. You can also leave it in overnight.
Then remove and repeat the wringing and braining (egging) 2 more times.
Wring once more and then start to stretch and soften. Don't expect a perfect buckskin your first time. You can always throw it back in the eggs if you get to a point where you think an area is getting too stiff. Each time you re-brain, it'll make the process easier the next time since you've already stretched it so much. Then smoke when you're happy with it.
Good luck!