start off
Get going first
Start off means to begin, with emphasis on the initial phase of something: Let's start off with introductions, The day started off well but got worse.
It often implies a trajectory—how something begins sets up what follows.
Start off can also mean to cause someone to begin: That comment started her off on a rant.
commence
To set underway
initiate · set out · get going · outset · onset · dawn · genesis · opening · departure · first step