No it is not. This will be the first time this parish prays the rosary as a group. (Anglican Ordinariate parish)
Then they are probably looking for a pretty much standard form of the rosary. I assume you know how to pray the rosary-- Sign of the Cross, I believe in God…, OF, 3 HM, Glory Be, then the 5 mysteries. The Rosary, strictly speaking is the 15-decade rosary, Joyful, Sorrowful, and Glorious mysteries. The Luminous mysteries were added in 2002 by Pope John Paul II.
Usually, in a large group setting only one set of mysteries is said. In the CC Monday is set aside for the Joyful mysteries, Tues the Sorrowful, Wed the Glorious, Thurs the Luminous, Friday the Sor, Sat the Joy, and Sunday the Glor. But sometimes a special theme might dictate the choice of mysteries.
In the Catholic large group setting, the leader announces each mystery, for example, they might say, “The first Joyful mystery, the Annunciation.” The leader says the first part of the OF, and the congregation the remainder. The leader begins each HM, and the congregation finishes each. Lastly, the leader says the first part of the Glory Be, and the congregation finishes. In many Catholic settings the Fatima prayer is said, “O my Jesus, forgive us our sins, …”
Then on to announcing the next mystery.
A nice addition is to read a little preface to each set of mysteries. These are available in any of the many rosary booklets that are around, or you can compose your own. They serve to focus the mind on the mystery and may be bring in scriptural references, or mention of the virtue or spiritual truth that the mystery calls to mind. But this is not usually done in very large groups.
Another thing is that if people are largely uninformed about saying the rosary, a short instruction would be in order before beginning. But if people are already familiar with the rosary from private devotion, this would not be necessary.
Sometimes, the leadership for each decade changes to another person, so that five people in all play a part. The first leader begins and end the rosary. We always end with the Hail, Holy Queen, Mother of Mercy…