We had a celebrant at my dad's funeral service.
She was absolutely brilliant and from beginning to end she was the most attentive, kind person I could have arranged his funeral service with. Nothing was too much trouble, she listened to dad's life story to understand and feel she understood the life and character of the person she was doing the service for. Nothing was off the table with regard to the words, songs, hymns , pattern of service, it was totally up to me as to how the service was carried out. I felt totally empowered as to how the day went.
Good luck lightshines.