I like natural colors myself, shade of tans and browns. I find a nice big blank wall, and I add texture to just that one side.
I start with a dark color then add a little lighter color with a bunched up rag and last I add a splotch of gold, just a tiny bit here and there throughout. Let each layer dry before adding the next, don’t overwork it just dab. You can also use a sponge.
I no longer own that house so I have no picture to show you. Most of the wall will be the lighter color in the end result. If you want it darker, start with the lighter color.
I think a textured wall only looks good in a large room, in a small area it closes in too much. I always use one shade or the other to finish off the other rooms, especially when the rooms are open and one leads to the other. It seems to draw everything together nicely.
It’s a lovely house, I like what you plan to do with the stair rails…but dusting would be a nightmare.
Get rid of those curtains for sure.