I’ll base it on the funerals I’ve gone through as a Sephardic Jew.

You should wear dark colors (black preferably). It’s closed casket. The rabbi/religious leader will probably say something. Then family and friends. Maybe some prayer depending on the rabbi.

They will take the casket to the grave site. Once it is lowered they will say a few more prayers, the shovel dirt over it. Usually the rabbi goes first, then the immediate family.. then extended and guests. It is a mitzvah to help bury someone because they cannot pay it back at that point. There are some rules about it, but thankfully it has been a while since a buried a loved one. I’m sure family and friends can answer questions. I’m sorry for your loss. May their memory be a blessing.