Sorry for your loss. Totally understandable that DH might not be able to get up and read something. I honestly don't know how anyone can TBH.
I've been involved in the planning of both my own dad's funeral and FILs, and what happened in both cases was that shortly after their passing someone from the funeral home came to see the family and asked about them and our memories of them.
So we just chatted for a while, and said 'remember when he said or did this' or the nice things we did as children, days out, holidays, family memories etc, and the funeral home person captured all this and turned it into a Eulogy for the celebrant or someone at the funeral to deliver (neither of our families are religous and both DF and FIL were cremated and had a ceremony at the crematorium) but there were 3 options, a completely non religious ceremony, a totally religious ceremony, or one a bit in the middle, a bit 'light touch' reliogious, and on both occasions we had the middle one, with a celebrant to conduct the service as a celebration of their lives, as well as saying goodbye.
They will probably also ask you to choose 3 pieces of music to celebrate/remember FIL, and for several funeral services I've been to, there's been a sombre one for quiet reflection, something of their favourite music, and a jokey one to walk out to and remember them in a humourous way. This is where people pick Going Underground by the Jam, someone else had Come on Eileen, because that was her name, that sort of thing.