Going to a psychologist for the first time. What should I expect?

I've been having a lot of issues over the past two years. It finally got to a place beyond what I can handle, and so I booked a psychologist appointment for tomorrow. Because mental health is such a taboo topic in India, I have no idea what to expect. Do therapists in Kerala know what they are doing? I have so many things I need to work through, will I get to discuss all of it? I'm a minor too, so is my therapist obligated to inform my parents about what I tell her?