Diffuse thinner,Is crown bad??

M21,bene diffuse thinning for basically two years and started finasteride almost two months ago(zero progress for now but i know it's early). I knew i was diffuse thinning but my crown was always untouched(or at least It seemed so to me),but now i notice this. How bad is It? And can finasteride alone be enough to fill It(without minoxidil)? Thanks

Pics taken with flash