I have already left instructions with the funeral home where I have my pre-need set up, just as soon as they receive my mortal remains, to contact my estate trustee immediately. My trustee has very specific instructions WRT my funeral Mass (TLM of course) as well as Gregorian Masses (arranged with a priest who offers the TLM), Month's Mind, and one-year anniversary. I took care of that several months ago. Not expecting anything, but death can and does come suddenly.
You have to make such arrangements. If not, well-meaning family members will simply call the NO parish church and whisk you off to a "Mass of Christian Burial", complete with a white pall, "On Eagles' Wings", instant de facto canonization, and maybe even balloons and teddy bears. I think you have to pay extra to have white doves released. Isn't that special?