Build the day from fixed moments
Start with wake time, feeds, naps, medicine or supplements prescribed by a clinician, nursery transport and the time parents leave and return. Add household tasks only around those fixed moments.
Demonstrate safe routines directly and ask the helper to repeat them while you watch. Correct one sequence at a time rather than handing over a long instruction list.
Test the workday before it becomes real
Use at least one practice day with the normal commute and contact pattern. Check whether meals, rest, cleaning and childcare can fit without rushed supervision.
Agree on late-return arrangements, emergency contacts and who may collect the child. A reliable transition is built from clear authority, not constant messaging from several adults.