I don't know about a good first dog, or not. I did find this info for you from the AKC standard:
The Vizsla thrives as part of an active family that provides daily exercise. He is lively and affectionate to his people, and possesses an above-average ability to take training. Although he sheds, his short coat requires low daily maintenance.

http://www.akc.org/breeds/vizsla/

We have 2 in Willy's Agility class. They are very good at Agility! Both in terms of athleticism and following commands. One is not dog friendly and has to be muzzled and crated when not running a course. (And all of us have to keep our dogs leashed while that dog is running.) I don't know either dog's history, so I don't know if she had it from a puppy or not.

You may find this page helpful also:
http://www.vizslaforums.com/index.php/topic,3320.0.html