Not so easy
Veneers are promoted as no prep or non- invasive.
It's not quite as simple as it sounds.
They can be removed, but it can take longer to remove than when they were placed.
First, i would visit with the most experienced cosmetic dentist you can find. Have him evaluate them and discuss what you don't like.
Occasionally they can be re-shaped, but unfortunately i see not everyone likes their veneers.