The ship name is Viking Orient and leased from Pandaw, but not on the list so I've put the name of the ship as the closest to "Orient". The cruise started in Mandalay, and not Yangon, but there is no such option for the port of embarkation so I choose the closest available option- Yangon.
Please keep in mind that the opinion expressed here is my personal and could be very different from your personal experience. I'll tell it chronologically with some practical advises as it goes.
Flight: we flew from NY to Taipei and from there to Bangkok one day prier to "official" day of arrival- to get used to 12h time difference and to see more. We've used pills "No jet lag" which, probably, helped, because we've arrived to Bangkok at noon in, I'd say, pretty normal condition. We did not purchase transfer from Viking, so we got a taxi to hotel on our own. Here is how to do it: