How do I make my first visit to a hair loss clinic?

I can see that the hair on the top of my head is gradually thinning, so I am planning to visit a dermatologist or a hair loss specialist.

Should I go to a general dermatology clinic, or should I go to a hair loss specialist clinic?

I am curious to hear reviews from actual users regarding the severity of the side effects of commonly prescribed medications.

Since it's my first time, I don't know much.

I would appreciate it if you could share any tips based on your experience!