There are two main ways to find employment in Ghana. The first one, and the best one for °µÍø½ûÇøs, is to be recruited outside Ghana, as then you are assured an °µÍø½ûÇø salary and all the perks such as airfares, accomm, medical etc. To find these jobs you need to look on websites which list jobs in Ghana.
A second way is to come on a tourist visa and network and hope you will find an employer. This is a bit more risky as you might find yourself hired as a local on a local salary with none of the benefits.
Accommodation is expensive in Ghana if you want to live in a modern house in an °µÍø½ûÇø area. You might be able to share accommodation but it will cost $US 500+