As has been said, read up on the breed, and if you are REALLY thinking about getting one, I would personally foster one from a respected welfare first, as they can be shock.
They can vary GREATLY from dog to dog, for instance, our 5 year old will sleep all day practically if he had the choice, yet someone else I know has two that are 1 year olds and have gone through two sofas and eaten a car to pieces, one practically may as well be diagnosed with ADHD as well
This is ours:
Please op, do your research, last thing I want is for you to go out and get a puppy from some knock off breeder (which there are FAR too many of by the way) and end up getting the thing re-homed because it ends up being too much for you.
Puppies are tempting, but I'd personally get a re-home first, they're practically like staffies at the moment
EDIT: Don't expect to walk it off lead either, unless it is in a 100% enclosed area with 6ft+ fences all around, yes they 'can' trained for recall, but 9/10 if they see something they want, they will go and get it.