how to manage 2 babies in diapers?

i am in a very similar situation. my daughter will be 20 months old when our new baby arrives, we've been working on potty training for about a month, but we are no where near her independently going to the bathroom. I am TERRIFIED about how she will react to a new baby but i just assure myself that I will not push her aside. I will make time for her and reassure her that daddy and I love her just as much as we love the baby (kind of hard to explain to a one and a half year old ya know?). As far as the double diaper duty, just give yourself time to get to each one- what else can you do unless you have the means to put your older child in a diaper changing day care. If it is a possibility, i say go for it. that time away will be good for her social skill development and give you a much needed break from double parenting duty. good luck to you!