Are blood DHT levels important before taking finasteride

Hey, so I’m planning to get a DHT test to check out the levels before starting finasteride. I’m wondering whether it is the amount of DHT or the sensitivity that matters when it comes to balding or other effects? Basically is it a waste of money to measure DHT levels if they don’t correlate with anything?

I personally think that it is not worth doing. What you want to know is: will the drug work for me? Changing drug blood levels doesn’t tell you that information