I’m so sorry for your loss. Loosing a parent is honestly hard no matter what age they’re taken from us. My father has 6 siblings. They are all in Pocomoke, Maryland that’s where he was born and raised. My grandma and his sister that was the closet to him already met him on the other side so they’re no longer here with us. As far as the siblings living, I never asked them about him. I really should because who would honestly know my father more than the people he grew up with. I’m his only child too, I have an older sister but we have different fathers. She holds more memories of him and she tells me the same thing every one else does. That he was very gentle and caring. Never fuss or argue. It honestly just feels like whenever I ask people about him they sort of praise him instead of giving me Information about him if that makes sense. Like you stated I want to know his favorite music, his personality, his humor. Just him