The best part about this approach is that no scary monsters are going to come and get you. The only monster you'll encounter is that voice in your mind that never ceases to blabber on about things.
And it's not easy. Nothing is when it comes to being quiet. If you struggle with behavior or have emotional tendencies - learning to be quiet is a humbling experience.
What to expect? A lot more breathing room, not only in your mind but also in your life. Doing this process is the same as installing a window in a room that has been windowless for a hundred years. Fresh air, natural light, and a much broader view on life.
Do you have any references like books, lectures, blogs or any information sources on these practices and the buddhist principles behind it?