Some people find planning the funeral with family and friends helps in their grieving. Perhaps you already know something of what your loved one wanted. You may even have planned the service together some time ago.
If you are uncertain the minister who will lead the service can help you choose suitable readings, hymns and prayers. If they did not know your loved one well, they will want to meet to talk to you to build up a picture of the person's life.
Some deaths will be especially traumatic, distressing or unexpected. The Church has special funerals for children, or after sudden or violent deaths, including suicide. Talk to the Rector about what is possible.
Each funeral and each death is different. You might feel numb at first then a mixture of grief, gratitude, joy and anger - perhaps all mixed together. You might be hurting with the tragedy of an unexpected death, or perhaps you are grateful for a long and fruitful life.
Funerals can raise profound personal questions about the meaning of life and death. This is perfectly normal. There may not be much time around the funeral to properly reflect on these matters, but you can come back to them later and talk to the Rector or another minister about how you are feeling and the questions and thoughts this has raised.
See here for more information on Church of England Funeral services: