As the Franciscan Crown Rosary combines five Joyful Mysteries with two Glorious Mysteries, I think you can pray it without concern and fulfil our Lady’s wishes.
Quoting website of The National Shrine of St Francis of Assisi
"Our Lord Himself commanded us to pray unceasingly (Luke 18:1), so right from the beginning various traditions in the Church have gotten started with this command in mind. Early monks threw pebbles in piles as they kept count of repetitive Our Fathers. Later, prayers were counted on knotted cords. And, by the 12th century, beads—usually of wood or clay, and sometimes even of precious jewels—replaced the knotted cords.
Over the centuries, many approved devotions have developed from these circlets of beads.
The Rosary as we know it today evolved from the custom of monks who, not having learned to read, and therefore having been unable to recite the one hundred and fifty psalms of the Daily Office, recited, in place of the Office, one hundred and fifty Our Fathers each day. In time, many Christian faithful began to recite one hundred and fifty Hail Marys each day as an expression of Marian devotion. By the beginning of the 15th century it was common to recite the Hail Marys in decades (groups of ten) punctuated with fifteen Our Fathers; and by the end of the 15th century an additional custom developed: meditating on the central Gospel “Mysteries” of the life of Christ and Mary while praying the Hail Marys.
“All generations will call me blessed”: . . . The Church rightly honors “the Blessed Virgin with special devotion. From the most ancient times the Blessed Virgin has been honored with the title of ‘Mother of God,’ to whose protection the faithful fly in all their dangers and needs. . . . This very special devotion . . . differs essentially from the adoration which is given to the incarnate Word and equally to the Father and the Holy Spirit, and greatly fosters this adoration” [Lumen gentium 66]. The liturgical feasts dedicated to the Mother of God and Marian prayer, such as the rosary, an “epitome of the whole Gospel,” express this devotion to the Virgin Mary (Catechism of the Catholic Church, 971, emphasis added).
The Franciscan historian Luke Wadding (1588-1657) dates the origin of the Franciscan Crown to the year 1422. He tells the story of a young novice in the Franciscan Order who, previously accustomed to express his devotion to the Blessed Virgin by adorning her statue with a wreath of fresh flowers, was prevented from continuing this practice in the novitiate. In distress, he considered leaving the Order. But the Blessed Virgin appeared to him and instructed him to recite a rosary of seven decades in honour of her seven joys; thus, he might weave a “crown” more pleasing to her than flowers on her statue.
From that time the practice of reciting the “crown of the seven joys“ became general in the order. Thus it became known as the Franciscan Crown—or the Seraphic Rosary. "
