Being ready is being over prepared. Buy a few break sticks, already be crate training get a good steady diet going. While your pup is growing up so will your knowledge given its your first pup. Another thing is are you sure its an APBT? You may also have an American Bully, American Staffordshire Terrier or Staffordshire Bull Terrier. To the unknowledgeable all these breeds get grouped together into the "Pit Bull" grouping although there is really only one "Pit Bull" breed and that is the American Pit Bull Terrier. Knowing exactly what breed your pup is can be very useful though all those breeds mentioned training is going to be the same as well as the risk of DA, though APBT's DA is pretty much 100% where as the others the risk and fight is no where near as high.
Aside from that studying the history, what makes these dogs unique and a breed. What they were bred for, knowing to stay away from Dog Parks without having to learn the hard way. Educate yourself to no end, prepare yourself for the worse when it comes to DA.
If you have children i would HIGHLY recommend training them and teaching them basics and do's and don'ts of the breed. You also need to work with them to establish their dominance over the pup now vs later. Also, you NEVER and i do mean NEVER trust your kids with your dog alone, not even for a second. No matter if they are 1 years old or 13 years old. Accidents happen in a blink of the eye.
As long as your willing to learn and show your willingness and don't make stupid avoidable mistakes i don't believe any one here is going to put you down. But you must take this breed seriously. They can be such lovable, sweet hearted dogs but you must keep in mind the power that you hold every time you walk him.
I also highly recommend learning about the Breed Specific Leg. and what you can do to fight back.
Training is a must, if you are unable to train yourself please enroll in a good training class for puppy training. (ideally a trainer who has the experience in the breed already)