Any of the
dairy breeds will be good for milk, so I'd recommend looking around locally, either for goat breeders, or on Gumtree/Craigslist, and anywhere else you'd find livestock for sale, and seeing which breeds are available.
Different breeds can be found in different countries, here in Australia the most common dairy breeds are Saanens, Toggenburgs, British Alpines, and Anglo-Nubians. If you look up a dairy goat association for your country or area, you will find a list of the dairy breeds there.
Anglo-Nubians have a bit more meat on them, but they are noisier than Saanens, Toggenburgs, and Alpines, so whether Nubians are a good for your
yard or not will depend on how close the neighbours are.
Another consideration is ease of handling. Saanens are more predictable and easier to handle than other breeds. People with less strength often consider dwarf goats such as Nigerian Dwarfs, because the smaller size makes them easier to handle. I have no problems with handling full size goats by myself, but some people do.
