I'm home alone this Christmas (don't get out the violins; I don't mind), so I suppose I will be "cooking", after a fashion, but like you, I've never been a very accomplished or enthusiastic cook, even before my health took a nosedive.
I won't be having turkey, as I think it's a bit overrated, but I will try to get a small joint of some sort - perhaps gammon, beef, or venison. Getting anything small this time of year is a challenge in itself, as everything is labelled up at least: "feeds 4 to 5". They assume everyone is throwing massive banquets. I don't want to be eating the stuff cold with pickles for the next fortnight!
I don't like Christmas pud/mince pies either (OK, I accept I'm weird), so I've got a banoffee torte and a toffee-pecan roulade in the freezer.
Vegetables: I'll be getting pre-prepared/microwavable. I think I can just about manage "real" meat from scratch, but I'm not going to stand around peeling and chopping veg. It's supposed to be a good day, when I can suit myself: not make myself exhausted, and have to retire to bed!