Finding a psychologist is a highly personal process, because therapy is an interaction! It is nice to consider what approach would fit your needs better (e.g., CBT, Systemic, Psychoanalytical etc)., and search online for psychologists in your area of interest. Through Websites, you can usually get a basic idea of their approach and areas of expertise!Most psychologists offer a free, short consultation, which can offer a nice way to "check" if it felt trusted, safe and comfortable to talk to them!
On a more practical level, it is very important to ensure that the psychologist you are working with holds advanced degrees and is properly registered with a respected board or licensing body [e.g., NIP for The Netherlands, etc]. *You can also ask them to provide you with licensure information! You have every right to ensure their professional accreditation!
Keep in mind: Some people don’t find the right psychologist the first time! If this happens to you - it is not your fault. You have already decided you would benefit from therapy, so it is worth trying again and booking an appointment with another psychologist.