We bought our onward tickets from bestonwardticket, great service and real tickets, not just reservations. We traveled to Vietnam in March of this year. There were massive lines at immigration in Saigon, probably took us 75 minutes just for that.

Are people mostly speaking Spanish there or the local dialect?

Don’t forget the rain. Miri, Sarawak averages 100 inches (2500 mm) of rain per year, with no dry season.