God bless you. It is a work of mercy you do in the name of Christ.
There is a useful and accurate presentation of the various parts of the Order of Christian Funeral at
duggans-serra.com/plan.shtml.
Then click to download funeral planning booklet. There will be a useable outline for you. You might also view
archdiocesesantafe.org/Offices/Worship/Institute/Funerals.html which explains the three parts of Christian funeral
While many Catholics recall a recitation of the Rosary the evening before the funeral, the Order of Christian Funeral does call for the Vigil for the Deceased. The Vigil is rich in prayer and scripture. There is nothing to prevent a Rosary, the devotional prayer par excellence, at its conclusion. It a case in which the Church has treasures new and old to assist us in commending the departed to the care of God.
A white pall, symbolic of Christian baptism, is placed on the casket as part of the introductory rites of funeral, and not in advance.
The General Instruction of the Roman Missal calls it "Funeral Mass, " but titling a participation aid is pretty much at your discretion. There is nothing prescribed in the laws or rubrics about that.
(But if I had to select between Mass of Christian Funeral and Mass of Christian Burial — one of your possibilities— I would select the former, since the second refers to what happens after the Mass and after the Rite of Committal.)
A Requiem Mass need not be an actual funeral mass. It is a Mass for the Dead celebrated in honor of the deceased. Many were celebrated after the death of Pope John Paul II. To avoid this ambiguity, you may want to refrain from using it as title.
Don’t worry though. Do your best. If you can’t down load from those links, post tomorrow morning, and I’ll post the outline from my personal notes.