We need more details, such as how old the pup is??

And yes you should try to find a rearing farm if it is a young pup, best to have it reared with other pups of the same age.
Last thing you'd need to find is a trainer, if it's still only a young puppy, first thing you should do is place it with a good rearer. Go to a racetrack, look for the most successful trainers with beautifully turned out dogs, and ask them questions about where they had them reared or would they recommend a rearer.

That's the only best way to do it, rather than trying to raise a puppy without a clue as to how to rear it appropriately. Are there anybody with greyhounds that you know of? If not, probably not a good idea in the first place to obtain a greyhound :-) as you really need to have someone that you can talk to and ask for advice in person about things that you need to know.

Good luck in your venture!

cheers

P.S I've only been in the industry just a tick over 26 years, not counting the years my family have been in the dogs! :-)