Hi, I think for service, you do not need too many songs. Usually, an Entrance Hymn , responsorial psalm, another song for the signing of the register, maybe another for when you do the consecration to Mary ... thats all you probably need. Oh yah, if you need an organist, you can contact my friend. He conducts one of the choirs in Risen christ (11.30am) mass and plays the organ too... He has done many weddings in our parish... you want his contact?