Rule 103.8 · Starting the Game
The starting player takes their first turn.
Subrules
In a two-player game, the player who plays first skips the draw step (see rule 504, “Draw Step”) of their first turn.
In a Two-Headed Giant game, the team who plays first skips the draw step of their first turn.
In all other multiplayer games, no player skips the draw step of their first turn.