During the day when my kids were at preschool or school, that was my house hold time, and baby time. I got meals prepared ahead of time, laundry done, clean up, and then often I would time the baby's nap for when the kids got home. So I had one full hour listening to how their day went.
I also cut right back on household stuff and made very simple meals. I'd rather spend time with my kids and have a rest myself.
Once my older kids were home, the baby just was part of the crowd. I had an exersaucer, a bouncy seat, a swing, and a mat in the different areas of our house so that as I moved around with my kids, the baby just got plunked down wherever we were. That way, they were in the middle of things, entertained fully by the kids and the commotion, and if they drifted off, I'd pop them in their crib for a nap.
I would say when your daughter is home, the focus can be on her, but if your baby needs your attention, just get your daughter started on something (puzzle, craft, toys) and take care of your baby while your daughter is entertained. She will get used to having to share your time.
I would do the baby's bath in the daytime so you don't do that when daughter is home.
I would put dishes/pans that need to soak on to soak, but I'd do dishwasher once they are in bed if you can.
When husband is home, get him to take baby for you so you can do some one on one with daughter.
Similarly, if you have a teenager nearby that you could pay for an hour or two a couple of days a week after school - to watch your baby, etc. My sister used to do that - paid a neighborhood teen to take baby for a walk when her kids came home from school.
Hope that helps :)