You describe totally the 'swimming in the treacle' of the early stages of grieving.....the glad of the help but please go away feeling, the want to be back to normal but nothing will ever be normal again feeling.
I promise you, hand on my heart, that those awful anxious feelings, over time, do change and soften. I despise people who say 'time heals' but I have to admit that it does. Dont get me wrong, I still have awful days all these years down the line but not as often. Now I can laugh at the things my lads did but it has taken time.
With regards to the music for your DD....have what the bloody hell you want!!! Its almost a year since my precious, wonderful Dad died - he said many times 'I dont want any 'God botherers' at my funeral, I want everybody to just stand up and say what they think about me - good or bad. We found a celebrat who was fantastic (I think thats what they are called - he did a non religious service for us)....my brother, my two sons and myself all got up and spoke about him - we had everybody laughing at the stories!!! Mum, Brother and myself picked a song that made us think about him. Dads and my song was 'We dont cry out loud' by Elkie Brooks and that was played on his way into the chapel, then Mum picked Danny Boy and finally my brother picked 'In my life' by the Beatles.
Without sounding weird it was a wonderful day - it was the kind of day that Dad said he wanted.
So I think you should stick two fingers up to the world and do what you want to do. xxxxx