J.,
Congratulation on baby #2! I completely understand your issue with having 2 in diapers but it may be unavoidable, 14 months is very early to start, I think they usually do better a little bit older, around 2 is pretty normal I think. She needs to know the difference in wet and dry and have words for potty, diaper etc. I will tell you my experience with my dd's. I had a very smart 2 year old and was all determined to have my her potty trained before dd #2 was born, this is not something you can rush through or force them to do, she did ok, and I she tried but she just wansnt totally ready yet. It's also not easy potty training one while you have a newborn as well, but we managed. She was in panties before she was 2 1/2, not completely accident free, but I was so happy. Now I am working on potty training her little sister very different from big sister, as long as I can stay consistent she does well, but all the holiday business has her backsliding:) All children are different of course, and I know lots of kids who didn't potty train until they were 3 and some who were completely trained at 18 months. You just give it a try when you feel she might be ready and see how it goes, it takes awhile to start sometimes, but once they actually pee on the potty, they kind of make the connection and start understanding what you are expecting. As far as potties go, we use a seat that sits on top of the big potty and a stool, much less messy than a potty chair and takes up much less space, also you dont have worry about the transition. Good Luck-Dont sress!, God Bless you!