leopard gecko breeding

[Brion]

i have a female leo just over 3 years old, and a younger male, around a year old. My intention was to breed but i realize the age and slight size difference may be the problem; i still feel that the male is too young. is there any recommendation as to what i should do? they are in separate tanks and i have introduced them to each other a few times, but the male is still skittish. i do plan on buying another female around a year old, but hopefully the two i own now may be compatible as well.