Dry scalp

so

So I have had dandruff for the last 2 or 3 months I'd say that it makes me not want to wear my hair down, it's like a snowfall 😭. I was using dove, then suave, then tresemee and it still wasn't going away. Now I'm using selsum blue medicated shampoo for itchy dry scalp and no conditioner and its helping although I still have some flakes. It isn't itchy anymore though. I shower regularly and wash my hair every other day or every 2 days.

Do any of you ladies have any remedies for dandruff, dry scalp and flakes?

What shampoo conditioner brands do you recommend for when I stop using selsum blue?

How do you add volume to your hair? I feel like I currently have none.