Should I go on finasteride?

Recently noticed some thinning in my hairline. It's at this point almost unnoticeable unless I'm obsessing in front of the mirror for hours, which I do. My dad is like a Norwood 4 in his late 60s, but after some thinning when he was young it mostly stabilized until his 50s, so maybe I won't go full George Costanza for a while. I don't really wanna risk it though. I prize my hair above all things.

The hairloss subreddits are a never-ending war between "finasteride is a miracle drug that saved my hair" and "finasteride is a devil poison that broke my dick and gave me cancer." I already have the prescription, I'm just scared to actually start taking the pills.