It depends on your country. If you're in the USA, apparently the trusted sellers are very good at concealment so you shouldn't get in trouble.
Some risk factors:
- Not washing your bitcoins or using a VPN
- Using fake names and address -- using a fake name and sending to an abandoned home is much more suspicious than just sending it to yourself. So is sending to your house but using a fake name. I'm not sure if this is still the case though, probably someone else who has actually ordered N will know much better than I do.
Also apparently in the USA, sometimes they'll send you a "love letter" and hold your package at the post office. If you go to pick it up then you'll be served legal notices (the love letter) but you can also ignore it and just be sure not to do it again since they'll have you on survellience from that point on. On Dread (dark web reddit) people say it happens more often with repeat and bulk buyers, or first-time buyers who didnt take precaution or ordered from shady sellers.
Also ofc if you inform others that you are buying N, and they are concerned for you, they can report you so be careful about that.