No, you don’t have to share everything in the first session. You are in control of what you share and when you share it. One of therapy's core elements is trust — something that takes time to build. It’s an unfair and unrealistic expectation to completely trust someone you’ve just met, even if they are a professional. Therapists understand this, and they don’t expect you to open up fully right away.
The first session is typically focused on understanding what’s bringing you to therapy, learning a bit about your background, and discussing how you’d like to move forward. You can choose what you feel ready to talk about and what you’d rather hold off on for now. It’s okay to take your time. Many people feel unsure, nervous, or even overwhelmed in the beginning — that’s normal. You can start with whatever feels comfortable for you, and gradually open up at your own pace.
In fact, with all honesty, most therapists also feel just a little nervous when meeting a new client. You're both getting to know each other — and that mutual process takes time.
Therapy works best when it feels like a collaborative and safe space, and your therapist will support you without pressuring you to disclose more than you're ready for.