First of all get a good book, Traditional Pig Keeping by Carol Harris, best £20 you’ll ever spend it will answer nearly all your questions.
Secondly i would start by fattening a couple of weaners and see how you go, first of all it helps you decide if you really really want ot keep pigs and that the ups & downs of pig keeping life are for you, once you get going this way you’ll soon know, pig keeping & breeding is very addictive if you decide its for you. Once thing to remeber that gorgeous 8 week old gilt will grow into a 49 stone monster who will rule your life for the rest of eternity til death do you part!!!!!![:D]