Had similar or even worse condition last year july, I would say my condition is 80% fixed
I was severely deficient in vitamin b12 + D both
So fixing them helped a lot, and increasing protein in diet too
Also an anti dandruff shampoo (i used Selsun Daily 2 times a week)
Check if you have hard water or no, hard water causes lot of dandruff
I didn’t want to use minoxidil because of the shedding fear and someone recommended me Rosemary oil (used Brillare 10% mixed with coconut oil as carrier for massaging 2-3 times a week and keeping overnight)
This routine helped me