Sky, talk with your sister before you worry about the obit notices. When my Mom passed away in Dec, the funeral director wrote the obit when he met with us to make the arrangements. It might already be done.

Boy it's rough. It was months before I could even start cleaning out Mom's condo. It will take time. Give yourself that time. It's ok to be very sad. Try to remember the good times you had with Mom. That helped me. Be well

Joe