I don't think the prospect of your little girl going to nursery needs to be an issue as the nursery itself will support you in whatever you do/want.
From my own experience and seeing others at the nursery, it seems to me that learning not to wet underwear etc takes a while, so the idea that you can somehow train
your child in a short space of time seems unrealistic (and stressful, esp when you end up feeling a failure).
Seems to me that if your daughter doesn't want to wear a nappy, it might be best to let her forego them, even if that does mean extra changes of clothing etc. My daughter was 21 months when she refused to wear a nappy during the day but she wet herself about once a day for almost a year and then one day she just seemed to stop doing it. Now, we're onto nappy-free nights and I've had almost a year of her wetting the bed most nights, but I had reached the point where I just couldn't get her in a nappy to start with and I certainly couldn't keep her in one if I wanted any sleep at all
Good luck in whatever you decide to do