From thinning hair on the crown to concerns about overall hair density, is hair loss treatment the answer?

At first, it seemed like only the crown of my head was thinning, but now that the hair is thinning overall, my concerns are deepening. I have heard that there are various hair loss treatments available these days, and I am curious about their actual effectiveness. In particular, I have seen many comments stating that satisfaction is high if you consistently follow the recommended number of sessions; would this be helpful for me as well?

I have also heard that the advantages of hair loss treatments include a relatively short procedure time and natural results. However, I would like to know how long the effects last and whether the satisfaction is sufficient relative to the cost. I am curious to know if those who have actually experienced hair loss have felt a noticeable recovery in hair density, and whether adhering to the recommended number of sessions is necessary to maximize the benefits.

If you have thinning hair overall, starting from the crown like me, please advise on which treatment would be most suitable.