On this page, Catholic psychotherapist Dr. Raymond Lloyd Richmond has some good things to say about the dynamics of spiritual direction, and at the bottom of the page are the questions that one should ask a would-be spiritual director to test their competence by personal and theological criteria:
chastitysf.com/q_director.htm
Also, I once heard a talk from Fr. Larry Richards and he was discussing the need for spiritual direction. To paraphrase, he said that one of the greatest “tests” for finding a spiritual director, who is also a priest, is to see how he celebrates Mass, particularly during the consecration. By his reverence and piety, can you see that he believes that He is holding in his hands the King of the Universe? If a priest cannot discern that he is holding Our Lord Jesus Christ, truly present in the Blessed Sacrament, then there is no way he can discern how God is working in your life.
I hope that this, along with the questions provided in the link above, will help you. Spiritual direction should not cost you any money, although there are some people, usually who are highly qualified, who do charge, but I don’t think that is a very common practice. It is of utmost importance to be transparent with your spiritual director. How can a doctor diagnose a patient, or give them proper treatment, if the patient is not honest and does not explain all the symptoms? So it is with spiritual direction. Of course, there should be an atmosphere of trust and confidentiality. It is absolutely important that whoever you choose to be your spiritual director is a person that you are comfortable being with and speaking to. I spent almost 6 months with one spiritual director who I never felt fully comfortable with. I couldn’t be completely honest with them, so I decided to switch to a new spiritual director. In our first conversation alone I believe more progress was made than in all the months I had previously spent with the other spiritual director. This new person was someone I was able to be completely honest and transparent with. I felt comfortable with this person, and I felt that I could trust them. These qualities, I think, are very important in order to have a fruitful experience during spiritual direction.