Young and balding

[Rg3]

Hi, I just recently turned 20 and have been noticing a receding hair line for a few months now. It started in the summer and I felt like I was losing 70+ hairs a day. Now that number has gone down to around 40.

My forehead has always been large and ive always had slight indentations of my hairline at my temples, but I feel its getting worse. I saw a derm and he proscribed keto shampoo and said I could start minox (but I haven't started the minox yet). I am wondering what treatments you guys think I should try, and what you think my norwood classification would be.
Thanks for the help