My dad is close to dying at this very moment. its hard to deal with. help me please?

his liver is bad his kidnetys are bad there is almost no hope. he has bacteria in his blood and we have already signed the paper allowing him to rest if he goes into cardiac arrest. im sitting here in the motel across the street from the hospital he is in. and im trying to be strong i have my two sisters with me and my 12 yr old brother im 29. im trying to be strong but its hard. can anyone share something with me to help please...this is really hard and so sudden..just last week we were doing the yard at home and now he is leaving us...my brother is so confused