The coworker who trains you patiently on day one has more influence than the manager you met once.

Influence follows proximity and patience rather than rank. Whoever sat with you on your first day, showed you where things were and did not make you feel stupid has shaped how you work ever since, and they held no authority at all. Meanwhile the senior person you met once gets quoted and ignored.

Be that person for whoever is newest this month, properly rather than briefly. Show them the thing everyone else pretends is obvious. Years from now they will still be doing it the way you showed them.