At your DD's age, there really isn't any need for yoghurt if she doesn't like it. Most of her nutritional needs are being supplied by your bm (and that will be the case until about 12 mths). Food at this age is just an experiment in introducing new tastes and sensations. I know of some babies who aren't even eating solids at her age!

Water isn't really necessary, she knows where to get a drink if she wants it. In fact, I'd be wary of giving her too much water in case it interferes with bfing, which is much more important.

When my DD was her age, I just offered a sippy cup of water with meals. I never paid much attention to how much was drunk (it was never much). Bfs throughout the day will more than satisfy her thirst, she'll let you know when she wants one!