A good thing for you to do I think, would be to spend some time here on the forum browsing through the threads and older threads too. There's a lot you can learn that might help you make a decision.
As it was mentioned, make sure the decision isn't made lightly, as these highly intelligent undomesticated animals are long lived and much different than keeping a dog or cat.
Some individuals talk, some don't. In many species it's the males who are more inclined. I also think looking at an adult who already talks might be a good bet. But WHAT IF you get a bird who just won't talk? You'd need to ask yourself would you be disappointed, or still find it in your heart to care for and love the creature for years nonetheless? Is talking the main attraction here, or are you drawn to birds in general for other reasons too? These are just some questions off the top of my head to ask yourself, but there are LOTS of aspects to consider. Again, looking through this forum might give some good insight. Good luck!