I remember thinking the same at this stage- I fussed around with a fake wood finish. But in the end, when you've added all the deck fixtures, masts, ship's boat, rigging... you can barely see any of these doors anyway.
Different modellers have different attitudes to this stuff, some people spend days, or weeks, on details that will never be seen- for the sheer joy of it and the satisfaction of a job well done. I say: if it can't be seen, it's not worth worrying about it. If you've got the Occre paint set, I'd paint the doors with their ochre, which is light brown, then make up a darker shade mixing a touch of black with some ochre, and paint the panels and surround of the door with the darker colour. It won't look brilliant, but then you can push forward with the rest of the build.
I felt the same with the stairs, which are brass... I just painted mine ochre and shaded them with a bit of darker brown. Maybe in future, I'd buy more paints and learn wood-effect finishes, but it's definitely more fun just pushing ahead with the planking and hull finish than getting bogged down in these details.