I plan on hanging myself in the woods
I think it will be the most peaceful that way and I won't have to worry about making noise
Yes I do plan on listening to music ; maybe Alex G
With that method, I don't think you have any chance of having someone physically with you. They would be putting themselves in too much legal jeopardy.
But you can use your phone to keep in touch with people until almost the end. If you are phoning someone in your own country, you would need to be sure that you are not creating legal problems for them. (The same might apply, though probably to a lesser extent, if you were phoning someone in another country.)
It might be better to talk to people on this site, via a goodbye thread. Or you could use one single person here whom you trust, via PMs.
You need to consider the practicalities of hanging yourself in the woods. Would you need to take a ladder with you? As a minimum, some reconnaissance would be needed, to figure out just how you would do it.