It can take anywhere from a few days to a few months to never, depending on where you place on the ranking list. Very attractive candidates get the call first, borderline ones sit and wait.
All the recruiting activity going on for people in the final stages is to line them up for the August courses, so yes, ideally it would be a quick notification, then BMQ, BMQ-L, brief stint on OJE somewhere (probably near where you were recruited) then the August start for QL3 with you on the road in January 2019.