In that case, N and SN are probably out of the running. Some users have said that N comes in a very discreet package, so you can't see anything from the outside. But you'd still have to make up a good story about why you get a package. Some SN vendors on eBay may also ask for discrete packaging so that there are no obvious labels on the outside. Still, in your situation, probably not the easiest methods.
https://sanctioned-suicide.net/threads/megathread-getting-n-from-a.2544/
https://sanctioned-suicide.net/threads/sn-megathread.1156/
A good alternative is the ExitBag, because you can legally buy all components without being asked questions. So you could buy everything in stores in your area and then smuggle it into your house in a box. A disadvantage is that the construction is a bit more complicated and the technique is very important. So it is best to try a test beforehand.
https://sanctioned-suicide.net/threads/exit-bag-and-inert-gas-megathread.8393/
Then of course there is partial or full suspension hanging. This is a good idea, because you only need one rope. But also here the technique is important. But if you do it right, it's fast and painless.
https://sanctioned-suicide.net/threads/how-to-hang-yourself.1183/
Another method could be jumping. Since you can travel, it shouldn't be a problem to find a suitable place for it. In the worst case you would have to drive a few kilometres. If the height is right, then this method has a very high chance of success and the fall lasts only a few seconds.
At the end you have to research and find out which method suits you best.
There are a lot more information and additional methods in the ressource section. You should check it out!