(((((Lizzy)))) I can not even imagine the pain you are going through. I dread the day my parents pass, and they are still fairly young. we are so close that it is going to kill me.
Biggest thing with grief is try not to plan too much in advance. An hour may be too much for your fragile soul right now. Minute by minute, hour by hour, day by day it will get bearable. I won't say easier cuz it's never easy to miss someone you love so much but time will make it bearable.