When I lost my Mother, I found out quickly that I wasn't as prepared as I thought. There is some comfort in knowing that the suffering is over, but it is still a hard reality to deal with.
I hope that your Family lives with the happy memories of your Dad and that you find peace in the days ahead.
Sorry for your loss, been about a year since we lost Dad after a very prolonged and difficult struggle, Parkinsons. You do not get over it, but you will get through it and they are at peace. Be well.