I did a Nordic walking course couple of years ago - it was interesting, but not really suited to long distance walking carrying a backpack.
A different type of pole to the normal trekking version is needed, and a completely different technique. There are lots of videos on YouTube showing both methods.
Nordic walking is more aerobic exercise - OK if you're training for the SAS, but not for the ups and downs of the camino trail, IMO, so you would be far better taking the pressure off with regular trekking poles - as many on here will tell you, they do make a real difference. However, please make sure you do use poles properly (again, lots of videos out there) - many on the camino seem to carry them more as a fashion accessory, often waving them around like a drum major with his baton...lol
Good luck.