Plug in freshly charged battery, and pull trigger
Now if you want to know why. In brushed motors you had to run it slow to have the brushes take the shape of the comm to prevent arcing that could cut down the life of the motor. This is the only reason you had to do any kinda breakin
In Brushless umm that part doesn't exist outside the bearings nothing touches the rotor, and bearings don't need any breakin
Only thing I will say is make sure the ESC is set right prior to running 1st time.