I am so sorry for your loss, and so glad that you found peace when praying the Rosary. I have had similar experiences. Immense peace is the most common result I get from praying the Rosary. The Divine Mercy Chaplet also usually brings me a permeating sense of calm and contentment.
There are many different ways to pray the Rosary, from using various Scriptures to other meditations. It can be merely a vocal prayer, a meditative prayer, or even a contemplative prayer. I have seen books and pamphlets which offer rosary meditations on the life of Mary, the life of Christ, the Stations of the Cross, the Eucharist, etc etc etc.
Here’s a clip form a couple of different websites I found once. Sorry that I did not save the links and cannot direct you there!
“The rosary has been with us know since the early Middle Ages. Its invention at that time was a stroke of genius because in those days there were no books, and when ordinary folks went to church on Sundays, they could not understand what the gospel was saying because it was proclaimed in Latin. Thus the common people did not have access to the Scripture. The rosary, based on repetition of the “Our Father,” which Jesus gave us, and portions of the Scripture that make up the “Hail Mary,” put these simple vocal prayers in a form that ordinary lay persons could easily recite. In effect, the rosary became the office of lay persons.”
"One of the secrets of the Rosary, though, is that it isn’t the sequence of Pater Nosters and Aves shown with an arrow on a drawing on the back of a “How to Pray the Rosary” pamphlet. It’s not a twenty-minute vocal prayer. It’s a meditation on the life, death, and resurrection of Jesus Christ, and you don’t finish meditating on that in twenty minutes … or ever! Vocal recitation is, as they say, the body of the Rosary, but the meditations are its soul.
It is not so much the quantity of prayer that is important, but its quality The development of faith and love is the fruit of reflecting on the mysteries of the rosary and especially of resting in them.