Start... well to start you need a female to breed him to. Of course this female has to be of proper size and health to breed. Then you need to control your temps to get them in the mood. Then probably buy or build an incubator. Try to introduce them to each other. See if they tango. Wait for some eggs. Incubate said eggs.

This is just your basic rundown but your best bet is to browse the breeding forum and check out old threads on this same topic.