The Rosary is classified as “popular piety” rather than “liturgy.”
Liturgy is strictly defined by the Church. Popular piety is not.
There are all kinds of variations on the rosary. I can’t possibly know them all, let alone list them all.
In the U.S. it’s typical to begin the Rosary with the Apostles Creed. That’s what most of the books or pamphlets will tell you.
At the same time though, exactly because it’s popular piety, you’re free to vary things as you see fit.
It you want to use the Nicene instead of the Apostles Creed, go right ahead.
The only thing I would suggest is that if you do it as part of a group, that the entire group be in agreement and praying the same prayers.