I'm 16. Am I too young to have porcelain veneers? (Photo)

i've always been so insecure with my smile, most people i meet always bring up something about my teeth like "you have small sharp teeth". dentist have said i should wait til I'm 18 but i want them now, i have 2 premature teeth and have big gaps in between them i would possibly want to get 2 or 4 porcelain veneers on the two small teeth , id thought about braces but I'm not happy with the size of the teeth . i'll replace them when I'm 18 with my own savings and get braces after is that fine?