And as much as I don't want to be that guy that starts off this way but I feel I need to point out that breeding is a lot more work than most people think. You need to think about the reasons you are breeding.
If you want to make money? That isn't realistic lots of us breed and none of us are rich.
If you want to create a new morph? That will take you years and a lot of money.
Do you want to get more geckos? It is cheaper in the long run to buy them.
Can you house all the geckos you will get in a season?
A single female gecko can have 10-20 babies in a season so you will need room to house them all until they sell. Most breeders don't sell when the babies are small less than 10 grams but I don't until 20 grams, that is 2-3 months. So you need a lot of enclosures and even more food. Plus they have seasons so right now breeding is hard you will have to wait till early spring before most females are ready.
But if you are willing to take on the task there is a lot to learn. Here is how I suggest you start. Do all your research on the two you have and decide what morph you want to go for. To start with here is a link to get the basics of breeding and genetics.
Leopard Gecko Genetics - GeckoBoa Reptiles
Then you can read on these two sites to learn about morphs and what they look like.
Category:Morphs - Leopard Gecko Wiki
Leopard Gecko Morphs
Once you know what morph you want you can use this site to see what babies you might get. This will work with recessive and dominant traits.
Leopard Gecko Genetics Calculator
Hope this helps.