Your Priest said the Holy Sacrifice of the Mass, isn’t a Sacrament??? A Catholic Funeral consists of #1. A Requiem Mass. #2. A Solemn Blessing of the Deceased’s Body. #3. Blessing of the Burial Plot, and Prayers for the Dead at the time of Burial.
There are sometimes Flowers given by members of the family or friends to adorn the Burial Plot. It is not gloomy, but rather soothing to the soul and heart, to see a loved one buried in the True Roman Catholic Tridentine Rite of the Catholic Church.
You don’t sound like a Traditional Catholic, so I can see your misunderstanding of what a Funeral is all about. You’ve had a lot of bad experiences in your life. You need time to heal from those in order to get a proper perspective on Death. Death is not creepy. It is a time of passage from this life into the next, which will be Heaven, Hell or Purgatory. You don’t understand the perspective of Death, or the Sacredness of the Human Body, being a Temple of the Holy Ghost.
You seem to want to trash your body, get it cremated, shove yourself out of the way, and end it all, because you have a dysfunctional family. Forget the family members, try to become acquainted with more Traditional Catholic people in your area, and study your Catechism, and read the Lives of the Saints. A good book to read is “The Glories of Mary” by Saint Alphonsus Liguori. Another good book to read is “The Passion and Death of Jesus Christ” by Saint Alphonsus Liguori. “The Secret of the Rosary” by St. Louis de Montfort is another wonderful book.
Are you, perchance, in ill health at this time? Do you think you haven’t long to live? Don’t worry about the Funeral, just get your soul ready for death. A Good Confession, and look over the Baltimore Catechism #3 by TAN Books and Publishers, before you make your General Confession.
Best of wishes to you. Do pray the Rosary Daily as requested by Our Lady of Fatima.