Hi Fox what a cute little friend
White fur isn't the easiest to do in watercolour thank god white fur isn't white as it reflects the surrounding colours and the light cast shadows over it I think it is better not to use a light background to make the animal pop out more from it, so to represent it you have to paint those light nuances and it ll look white or mentally translated into white by the contrast difference against the background
To paint white you do not have to use Chinese white or any white but leave the paper unpainted now for a highlight at the end or to fix an area you can use some opaque paint
You did well with the animal but it doesn't emerge from the bg.
I have edited your picture to illustrate my words first I gave a richer colour to the bg then pushed the different colours on the animal and blending them more like the pink in the ear or arid the nose
I have also defined more the direction of the hair arid the ear and above the eye ,I have also exaggerated the reflections on the eye and added a white outligne to the one against the fabric as in the photo .
I have also darkened the shadows around the animal and added color from the reflected bg to make it more 3D all those colours and dark make the animal wither
If something isn't clear do not hesitate to ask
I did those changes roughly with a photo editing software so it doesn't look like watercolour but it is just to give you an idea