When it came to her funeral plans, my Mom did not want to be involved other than two wishes she offered. 1) she wanted to be cremated, 2) she wanted to her ashes to be buried on her mother's plot.
The rest was left up to my sister and I. At the time, we were 29 and 31 overwhelmed with emotion and stress. At the time we thought "we are too young to be doing this" then resolved "we have to do this, it may be a hard thing to go through, but for someone we loved so dearly we could be strong and do it".
We set about planning the funeral and at some point remembered years back attending a funeral of a young family friend who died at 20 in a car accident. That funeral was a celebration of life instead of marking a death. Much of the service was positive. We remembered my Mom saying to us "that's how I would want mine to be + an Irish wake with an open bar" (she was not drinker but liked a good party). So that's what we did.
For the funeral we choose readings and songs that were positivie. My sister designed a PowerPoint slide show of photos of my Mom with all her family and firends. We had a wake at the local Lions hall complete with an open bar. I heard one person remark "this is the best funeral I have ever been to!" that made me smile because my Mom would of got a kick out of that. Of course, we also fullfilled the 2 final wishes she expressed to us.
Looking back planning her funeral was one of the hardest things I have had to do in my life but I am stronger for it.