Struggling to cope with my Dad passing away

My beloved Dad sadly passed away at the beginning of September of Multiple Myeloma which was a type of cancer which we as a family had never heard of before,  he fought it for 4 years until eventually he couldn't fight it anymore. My mother, sisters and I were there with him when he passed which im grateful for although struggling with in terms of how traumatic it was. I feel privileged that we talked to him and told him how much we loved him etc but just cannot come to accept he's not with us anymore. We all have children which helps to a degree but the pain in his loss is immense and I along with my family don't know how to cope with him not being here to see to talk to and to hug, it just seems so final. I'm dreading family occasions as he was such a big presence in our lives as he won't be there to share it with us it won't ever be the same, how do you ever cope with losing someone you were so close to? I just can't comprehend it and like my sisters are really struggling with our grief. We always asked his advice,  he was always interested in ours and our children's lives, where do we go from here? It's so hard to not see him anymore :(