18 and losing my hair, recently started finasteride.

[Nevyn]

I'm 20 (will turn 21 in 2 months) and I'm considering getting a hair transplant for my temples and frontal/crown area (which is less dense) next year.
no way in hell can I wait till I'm 30. I can't spend 10 more years of my life with my worsening hairloss condition.
Could you explain what the problem is if the transplanted hairs are mostly DHT-resistant?

The main problem is that whilst your DHT resistant hairs continue to grow healthy the rest of your hair continues the pattern it was always going to do. Let's say that you have unlucky genes and that you were always going to be a Norwood 6. You get the transplant and it makes your hair look good for a year or so. Then gradually over time the rest of the hair begins to receed and in 10-20 years time you would still be a norwood 6, but a norwood 6 with a frontal hairline. It would look absolutely ridiculous. The reason they say to wait until you are later in your life is because by then, you should be able to see at what extent your hairloss is going to be. Unless you have the money to keep paying for a transplant every 5 years to keep up with your rate of balding and even then, your head only holds so many folicles to redistribute. I don't mean to put you off and I know it's not exactly fair. I think you should understand the facts though and even if a surgeon says to you "that's BS" chances are they are just after your money. Google it, and be well informed before you make a decision