My mom's funeral

We found out she had lung cancer 6 months ago she did all her strength testing and heart testing and everything to make sure she would be okay to go in for surgery he goes in on surgery. They say she made it through the surgery but her blood pressure dropped and they tried for 30 minutes to keep her alive. Is what the hospital told me then the Doctor told my sister that she had a heart attack and that she started bleeding on the inside so we really don't know exactly what happened. Waiting on the autopsy report they said it will take up to 6 to 9 weeks. And we don't have the money for a funeral or anything didn't know she was going to die.