The Ludo you already know, against people near you. There is nothing to learn first, so the conversation starts on the first round.
Four players, four pieces, one die. The rules are the ones you already know, which is exactly why it is the best first game with a stranger: nobody has to learn anything before the conversation starts.
The server picks your opponent, not you. You cannot request one, and nobody can arrange to keep landing against you. Leaving mid-match is a loss, and doing it repeatedly costs you matches.
No game on YouPlanet is played for money. Coins and diamonds are spent inside the app on items and cosmetics, and they never convert back to cash. There is no withdrawal and no cash prize.
There are two boards: a two-seat one and a four-seat one.
About eight minutes.
Two ways: open a table, which everyone on the games tab can see and sit at, or send an invite from your messages to somebody you already know.
An empty chair is played by a bot, on the same rules and the same server-rolled dice. We say so here because it is visible at the table anyway.
No. No game here is played for money. Coins and diamonds are spent inside the app and never convert back to cash.