Question in topic title. @Josh
The pairings will, as far as I understand, be published before 5 April.
Matches are to be scheduled between the players themselves.
To my understanding, round 1 matches must be played until the end of 11 April UTC, round 2 matches until the end of 18 April UTC. Round 1 and 2 will have no arbiter supervision. Starting with round 3 (12 players left), arbiter supervision is needed. For that purpose, the arbiting team will publish in time before the start of round 3 (starts 19 April) an arbiter availability schedule. Players will still arrange the matches among themlseves but can only arrange matches at a time when an arbiter is available according to the schedule.