Inquiry about hair loss treatment prices

Hello!! I am writing this inquiry because it seems like the crown of my head and my hairline are getting thinner and thinner.

I feel like there are limits to what I can achieve on my own, even using hair loss shampoos and taking supplements, so I am looking into professional hair loss treatments. I read online that the earlier you start treatment, the much better it is for saving hair roots. Is that true?

What types of hair loss treatment programs are available? And since price is the most important factor, please let me know the approximate cost per session or for the package prices!

Please let me know if it interferes with daily activities or washing my hair immediately on the day of the procedure, how much pain it causes, and approximately how long a session takes.