A couple of things

1. Take off the top and back and see if the belt is ok. See if the pulley will turn in either direction.

2. Take off the front lower panel and you should find some tech notes with trouble shooting process. See if you can run them.

A likely problem is your motor control board, sometimes called the speed control board, but it is expensive so you want to see if you can determine the problem before spending big bucks.

Part number: AP3967975

Washer does not advance to any of the agitation or spin cycles after the fill cycles is finished.