Holy Rosary

I have noticed that in a few books i have, even a smartphone app when i pray the rosary and i get to the mystery - do i just say ( the 1st sorrowful mystery)

or do i say The Agony of Christ in the garden

or do i need a book and have to read the little scriptures it has for that mystery?

I joined this group back in July and just now making first post.
I just like all of you.....enjoy praying the Rosary every day. I feel the day is not complete without the Rosary. Actually prefer to pray the Rosary first thing in the morning. Just was notified last Friday that my job after 34 years of service has been eliminated.......so started the Novena to Mary Undoer of Knots. One door closes and another opens.....of course with Mother Mary's help.
RosaryTexan

Our Father, Who art in Heaven, hallowed be Thy Name. Thy Kingdom come, Thy will be done, on earth as it is in Heaven. Please give us this day our daily bread and forgive us our trepasses as we forgive those who trespass against us and lead us not into to temptation, but deliver us from evil. For Thine is the Kingdom, the power, the glory, forever and ever. Amen.