I wouldn't breed either of them until they are a year old...just my preference.
When you are ready to breed them, I would hold the female outside the male's cage so they can both see each other and watch their reactions. If the female hisses, rocks back and forth, gapes, darkens her colors, etc then she is not receptive and should be put back in her cage. If she remains calm then she is likely receptive. If the male doesn't hiss, gape, etc as well you can put the female in the male's cage so they can mate. I still watch them for a few minutes to see if they are okay together. You can leave the female in the cage until she turns non receptive colors or rejects the male (bosses, etc).
