No problem, friend! When I was first getting into opiates, the whole "don't do it!" spiel was wasted on me for sure. Either a person is going to try it and actually never do it again, in which case there's no point in giving them a speech, or like me they're going to try it, love it more than anything and chase it all the way down until they're shooting heroin and ruining their life. In this case, the speech isn't going to do anything for them either.
God, I miss oxy. I'd literally murder someone for some right now. I'm 6 months clean chilling in my parents' empty house for the night. If I could get away with a one-time high without it spiraling my life out of control, I'd do it for sure, haha. I hope you get the euphoria too, but not to the point where it hooks you in. Snorting with no opiate experience could've been a disaster. A huge amount of people do get really sick from opiates when they first start taking them, so snorting 15 mg had the potential to ruin the rest of your night. If you do get sick, though, don't panic, just lie down and breath through it. It'll pass once the pills wear off. Non-drowsy Dramamine can help too, if you have it on hand. And if you're not too sedated, Benedryl will do wonders for any itching you don't want to embrace.
I'm not sure why you couldn't crush the pill. I always did generic oxycodone, and it was almost always bought illegally. It crushed just fine, although some of the more legit pills were definitely harder to crush than the ones that had clearly been cut and repressed. I have heard of pharmaceutical companies messing with brand-name OxyContin so that people can't snort it. So the inside of the pill looked like the inside of a Skittle? Kind of a waxy consistency? It's probably either one that's been altered so that it can't be crushed, or some sort of time-release concoction. There are ways to dissolve those and snort them, I believe, but I never encountered that kind of pill, so I don't know any of the methods myself. I have no doubt in my mind though, that you could snort that little guy if you really needed to, hahaha. Someone somewhere on the internet has figured it out. Sorry, big Pharma.