Do you have a Shop Manual?

Have you removed the tire/wheel and looked at the drum?

The front hub is part of the drum. The drum has to be removed to get to a wheel cylinder. Unless you are talented, you will have to remove the brake-shoes and springs/etc in order to remove the wheel cylinder.

Do you have any brake tools?

http://www.harborfreight.com/automotive-motorcycle/brakes/3-piece-brake-spring-pliers-kit-97804.html

http://www.harborfreight.com/automotive-motorcycle/brakes/7-piece-brake-tool-set-188.html

http://www.harborfreight.com/automotive-motorcycle/brakes/one-man-brake-bleeder-kit-37201.html