Hi, welcome to BW! Sounds like things are a bit tricky for you at the moment.
We have a somewhat routine with her activity and eating but her naps are horrible. She will show signs of being tired but once we start to wind her down she won't have it and fights sleep.
Can you give me some more information about this? First off, it would be helpful if you could just jot down times when she wakes, eats, goes to sleep for the next day or two to give us a bit of an idea how we could help with the routine. From what you've written here, sounds like she might be overtired by the time she's getting to sleep (possibly undertired when you're starting the wind-down) which is why you're getting those 30min naps.
PUPD will only work in certain circumstances including that LO is actually tired enough and not too OT so getting the routine at least close to suitable for her is a key step before going into PUPD.