Help Us Lay my Dad Richard to Rest the right way

My father Richard David Miller was born November 11th 1981 and has unfortunately has suddenly passed away due to hospital negligence. Richard was such a sweet and caring man he was loved by many friends and family. Anybody that has ever encountered my Dad has loved him because of his welcoming and loving spirit. He devoted his entire life to raising his daughter on his own as single dad and he never complained once Richard loved his kids and always made sure We had what we needed to thrive in life. when I turned 19 years old my dad had started his own family with the love of his life creating my little brother who has now just lost his dad at the young age of 3 years old. My father’s death was highly unexpected he was just fine when I talked to him on the phone 2 days prior. This tragedy has took everyone by surprise and has left us feeling so hopeless my father was the one who handled the financial stuff and we are just so lost without him and have no idea how to go about anything, with this being so sudden we aren’t prepared for any of it so I’m asking for some help anything helps really I just wanna lay my father to rest the right way.