When's the best time to start visiting a gynecologist?

Blueswan • 🏳️‍🌈 (Pan/demi, she/they) A smart feminist who writes, sews, cooks, etc. kundalini/Sikh follower, and hopefully successful college student. ADHD/anxiety
I'm 19, I've not have sex of any kind, and my health is pretty good. Though I might not need it, I feel like I should have visited before now. When was your first visit and why?