Questions about a year of hairloss

38M. Going through hair loss at a pretty fast pace right now. In a year I saw a bit of receding hairline to somewhere around stage 4. Doctor said it looks like normal hair loss (family history) and told me to try out some minoxidil or finasteride (or both) in a few months, since im going through a rather stressful situation since last month (the stress did not accelerate or decelerate hair loss). My plan is to try out minoxidil and a derma roller in 2 months, and if that doesnt work in 6 months, ill ask my doc about finasteride. I had a few questions before then

Is genetic hair loss at this pace considered normal?

Do people go completely bald or does everyone have a different ‘baseline’ of baldness?

Can anyone recommend a good dandruff shampoo? Should I use ketoconazole which may or may not help?

Any alternative stuff I should try? I heard about tea tree oil, rosemary oil, etc. I dont think the research on these are very strong, but I figured it cant hurt

Thanks