My scalp looks thinning; is hair loss shampoo effective?

I'm worried because I'm losing a lot of hair these days.

My hair was thin to begin with, but it's falling out even more, so the crown of my head looks thinner than before.

I used to use hair loss shampoo, but I didn't feel much effect, maybe because I didn't use it consistently.

I find procedures a bit daunting, so I'm wondering if you happen to get help with hair loss using shampoos or supplements.