As long as you've got your facts and a vet ready, you're good to go.
Females come into estrus 'heat' roughly every 4-5 days, so you would need to put the female into the males cage (never the other way around!) and you'll soon know if she's willing to mate. Do not pair them up together (keep them in the same cage for a long period of time) as the female will be aggressive to the male and death of the male is likely.
The male will mate with the female several times before he ejaculates. Then, all you have to do is wait 18-20 days (average gestation) before the female gives birth. Do not clean the cage out until the pups are fully weaned. And do not touch the pups until they are at least a week old. If you are at all concerned about the pups, get a pencil and rub the back end (not the lead end) around the bedding and the mother, then you can carefully prize the nest apart.
The female will need additional protein during her pregnancy and lactation period.
Average pups born at roughly 6-8. Please expect as many as 14-16 pups in certain cases.
And im sure you already know this but don't use pet shop hamsters/rescue hamsters to breed, use ones with a known genetic history, at least 3 generations.
I hope this helps, any further questions please ask
