I breastfed DS. One night I had a stomach upset and DH tried him with a bottle - total waste of time, so I had to feed him myself anyway. I did start him with gluten-free baby rice quite early, but just mixed a teaspoon or so and he just tasted it.
I suppose, Abuelana, that it rather depends on when your DD is going back to work. If GD is going to be 9 months or more, there's plenty of time to get her used to a bottle. Moreover, the bottle isn't really going to be a problem because by that stage, if she won't take it, a feeder cup should supplement solids during the time that you have her.