It’s worth filing a ticket in the mean time in case a GM can help you. You can always cancel the request.
I presume things may have changed since prepatch because we used to be sent to speak to Nathanos in the Inn in Orgrimmar and then we could skip the intro if we chose to by speaking to Nathanos again. Or we could meet him on the roof of the main gate to start us off. Or is that the part you are stuck on?
it has been weeks ago since i logged in on this character but i think i somehow entered a dungeon when i was in stormwind already and that teleported me out of there and now i can’t get back
That happened to me as well, on a fresh Death Knight I got to 50 on the first day of prepatch. I wanted to skip the scenario because I had already done it on another character of the same faction, but there were no NPCs at all to be found at the spot.