My bathroom's lighting is incorporated into a medicine cabinet. There are 4 sockets that are fed from a single hole in the wall behind the cabinet. Although the bulbs are behind a glass panel, they can be seen and are tacky looking. I want to dismount the cabinet and replace the lighting with a decorative fixture that supports 3 lights. I know nothing about electricity, but I think that I could do this project with the right guidance.

An advance thank you for those who can help light my way...