Ok before I even start with the links & info please understand I am not against Pit Bulls I actually quite like them & have worked with numerous Bull breeds & their crosses.
But you have to be a little more aware of what you have on the end of your leash & take the right steps to assure it a happy long life with you.
I would start by reading the links I will add now about why you should look at other ways of spending social times with other dogs than a dog park. Dog Parks | BAD RAP Pit Bull Rescue Central
Then this link that is about breed temperament & managing your dog, 1 thing you must understand is a game bred dog can be fine then just switch on generally & it's often between 1 & 3 yrs either when they are just hitting young adulthood or as fully mature adults it's quite an individual thing.
To be driven to fight is not a learned behaviour but is a genetic trait & no amount of the right upbringing will erase genetics. What You Should Know Before You Bring An APBT Home
I would advise you crate train your dog now as it quite possible you will need to crate & rotate in the future if you have more than 1 dog.
I will leave you with this poem
A Day At The Park
He is just like other dogs I would always say; He loves to go to
the dog park to play every day
Everyone loves him there, so it's ok; My dog won't fight--he
wasn't raised that way
But then one day, right before dark, A troubled young man
came into the park
He had by his side the biggest dog I'd ever seen, And
unfortunately for us, both were quite mean
We asked very nicely if they would just go; The dog answered
with a snarl and the man with a harsh "NO!"
Well his dog was a terror, threatening to all; Then he started a
fight with a Lab over a ball
They fought pretty hard and the man would not intervene;
Then here comes my dog and pushes right in between
He grabbed that big dog and thrashed him around; And with
one quick jerk threw him down on the ground
The Lab was able to escape; I heard everyone cheer; But my
dog was now in a frenzy and would not let me near
When he finally let go, what I saw stopped my heart; That big
mean dog had been torn apart
The authorities were called, the big dog was now dead; But
they didn't take the big dog; they took my dog instead
We all tried to explain that my dog saved the day; But because
of his breed he was taken away
You see my dog was a Pitbull and they don't get any breaks;
One small incident is all that it takes
A dog had died; And though he hadn't started the fight,
My dog was held responsible for what happened that night
He was deemed a danger to all and sentenced to death; And I
hold him now as he takes his last breath
It's my fault that my dog is being killed today; Please listen for
a moment to what I am going to say
Everyone warned me about his potential to fight; I said it won't
happen, I am raising him right
And now my dog is paying the ultimate price; Because I was
stubborn and wouldn't take the advice
He only did what he was bred to do; Learn from our story;
don't let it happen to you.