Just starting out.

I understand the risks of taking him out, just don't want to get him killed because of my stupidity. I have read a few of the threads on here about puppy training and am taking it all in. But what about getting the in the pen one a month or every other week just to help him starting with smaller pigs and working up to bigger ones. One of the guys we are going with tomorrow has a twelve acre pen with a dew hogs in it and we might get in there with the pups. Also what else should I get that is a must have when starting out. And at what age should u order a vest. I'm going to get a collar on it's way. Thank you in advance for all your advice.