N.,
What a fun time for you! I am a working Mom too, and I stared our daughter's solids (she's 20 months now) around the same time. I started by giving her cereal at dinnertime. Then once I was comfortable with that, I asked the daycare to give her a bit for lunch. Once we were comfortable with the cereal, then we added a veggie or fruit each week at the lunch or dinnertime hour. This is of course in addition to all of her regularly scheduled bottles. I don't remember when we added breakfast in, but I fed her at home. When she was old enough to hold her bottle and feed herself ( I think around 8 or 9 months), I would fix her bottle in the morning and let her drink it on the way to daycare. Once we got there, I would have them feed her a solid breakfast about an hour later. Then eventually we were feeding her 3 solid meals a day plus all the bottles. Then at 1 year, the bottle went away and we were left with the solids and adding in real milk.
Hope that helps. I remember being so confused and concerned about how the whole "eating" schedule was supossed to work out.
Good luck!