Quick facts
Capital: Naypyidaw, but the biggest city and hub remains the old capital Yangon
Transport: buses are the main way tourists and travellers get around. There are also domestic flights, boats, and train which takes a lot longer. I use 12GoAsia for checking and booking.
Currency: Myanmar Kyat, 1000 roughly = 4 HKD = 0.5 USD
Sim Card: there are plenty of tourist sims around 5 USD and you can preorder them on Klook or buy at the airport.
Handy Apps: Klook is useful for booking transport and tours, Grab for taxi
Language: Burmese, which is different to the nearby Southeast Asia language.