To learn the Proper of the Mass from the Roman Gradual, consider purchasing the collection of Gregorian recordings by Schola Bellarmina: Every Gregorian chant of the liturgical year, professionally recorded
Hymns:
Alma Redemptoris Mater – simple tone (Advent to Feb 3) Great tutorial below:
Ave Maria (pdf of the music to download: Ave Maria )
Ave Regina Caelorum – simple tone (Feb 3 to Holy week) (download sheet music: Ave Regina Caelorum – simple )
Regina Caeli – simple tone (Easter to Pentecost)