auto movement when triggered

im planning to make a scene where i can make my capsule guy move its own when triggered inside a collider of a door/elevator.

this is the scenario:

each with its own colliders. What i want here is that when inside of a collider and an onscreen button is pressed my capsule guy will start moving towards the doors AFTER it opens but i dont know where to start my code for the automovement and make delay after the animation ends.

i already have a controller that lets my capsule guy move left/right and a onscreen button for interactions. i hope someone can help me with this, will really appreciate it!