I don't think you're being morbid at all nanna8 It is so sensible to sort these things out while we are able to than leave it to a distressed family.
When my late Mum was alive she and I knew that as far as my siblings were concerned - the shorter and cheaper the better and Mum knew she wanted a traditional religious funeral,
Together, we sorted her favourite hymns and readings and completed her Order of Service. We also completed mine at the same time - I'm not planning on going anywhere soon but who knows!
When Mum's time came the funeral directors and Priest had Mum's order of service and there was no trouble from siblings!
My AC knew how much it helped me when Mum died and are delighted to know that when the time comes they don't have to worry.
I won't name them in case they are favourites of other people but I know that there a couple of more modern hymns that I just cannot stand so planning well ahead is strongly recommended!