Funeral service for kristen

My sister lost her life giving birth to my new born niece. Her family is devastated we are all crushed. She left behind 3 beautiful kids 2 young boys and her new born Aeliyah Jewel. Anything will help during this painful time. Her husband is really depressed and doesn’t know how to deal with this pain right now and I just want to make sure my niece and nephews are taken care of and the funeral service is paid for. Her husbands back is also out so he cannot work at all right now, and expenses after the funeral will go to her husband and the 3 children she left behind. Thank you guys anything will help.