Help with funeral expenses for my 23 year old

Mental health and addiction took over after my daughter was a victim of domestic violence and abuse. , My first born took her own life at the age of 23, and leaves behind three small children. This is the second child I have to bury at 45. Any help is appreciated and anything over the funeral cost will be used for the grave marker and Chelsea”s 3 toddlers only 1 1/2, 2 1/2, and almost 4, year old children who are in the care of a close family friend. Please be aware of mental health and take it seriously this was so preventable