You will need someone whose hand you can hold. My ds was crying, I held his hand tight and that helped me because I had someone to help get through it
The funeral goes in a whirl, people are very kind and helpful
The next day feels empty but find a job to do and make sure to have regular meals, to put structure in your day
When you are ready and in your own time, tell him that he can leave, that you will be alright, that is when you can start those baby steps to move forward