hate to say it,,but if you got to ask here .........
1 are you sure its the problem
2 get shop manual...any auto parts store,,,,[Chilton's a little better than haynes in my experience]
3 open hood,,,[for light] and slide under,,,look around until you see a starter....follow the battery cable [red[ down to starter....its a hard job if you dont have tools and knowleknowledge