There are two ways to induce lactation.
One is to use a certain hormone combination.
The other is with stimulation.
Using an electric breast pump would be preferable because it needs quite some time, a few minutes, and regular cycles, a few times a day every few hours.
But its also possible to do it with massage.
Milk production depends, its often higher when induced with hormones. It might be more over time.
Exact cycles and experiences can be looked up.
hugs