Quick facts
Capital: Vientiane, which is close to the border with Thailand with its own quirks and charms.
Transport: There is a new train line that connects the capital with Luang Prabang, with Vang Vieng as a middle stop. Otherwise, you have to take tourist or local buses between cities, and be prepared for bumpy rides!
Currency: Laos kip, although some places also accept Thai Baht and USD.
Sim Card: I got sim cards that worked for the entire region like this, but you can also get them at the airport or in town.
Handy apps: Klook is good for booking tours and transport. Otherwise, it’s best to ask your hostel/hotel/accommodation for help.
Language: Lao, which is a little similar to Thai. Sabaidee = hello, kup chai = thank you