Is she satisfied on what she is getting right now? If so, you needn't be in any rush to start other meals. We did either breakfast or lunch for a while, depending on the day, but it took us a while to build up to 2 meals, then there was a gap until dinner was intro'd.
Good first foods include mashed ripe banana, avocado, Riley also enjoyed eating little bits of those off my finger. Fruit purees, such as pear etc.