You don’t need to get a spore print, most Galerina are so thin and small, like you saw they just dry out before you get a print most times. Take your micro-fine tweezers, and grab a small piece of the veil tissue. That will have plenty of mature spores for you. If they are still smooth, that is kinda interesting. If you can, try and get a photo of the cystidia also. Not that you’ll get a species name out of that, it would just be interesting…