One of the professional skills of a psychologist is to create a trusting and calm atmosphere, so there is no need to specially prepare for the consultation.
Сhoose a quiet and safe place where you won't be heard or distracted.
The first session usually involves getting acquainted with the therapist and clarifying your request. No one will demand that you immediately share very personal things or delve into the past. The psychologist will ask you a few questions about your life, your dissatisfactions and difficulties, and your goals in therapy. This is necessary for the psychologist to understand how to proceed with further work.