Has the tank been cycled prior to the fish going in? The cloudy water can be caused by bacteria that bloom with the new ammonia load from the new fish. It should clear up when the bacteria catches up. The cichlid will (when they get big enough) murder your goldfish, they are territorial and aggressive, the only good tank mates for cichlid are cichlid. There are a ton of different kinds and colors, there are a ton of websites that are cichlid specific and can help you find good tank mates.
I would give your tank a chance to cycle, keep an eye on your ammonia, nitrite and nitrate levels. Things may get buggered up fast, good luck, hope I helped
