I think I'm in the early stages of hair loss. Should I start treatment at a hospital?

I am worried because I feel like my hair is falling out much more than before.
I'm looking into it because I heard that managing hair loss in the early stages is important.
How was it for those who actually started treatment after visiting the hospital?
I am wondering if the amount of hair loss decreases if I start medication or treatment.
I also want to know what kind of tests I will undergo first.
I would appreciate advice from those with experience in managing hair loss.