I agree with Moses and danne.
Wait.
You certainly have lost some hair since you were 18, but at 23, wait until you are older and have more hair loss. You may lower your hairline just a little bit, but you also may need those hairs later on when you are going to get the "big" surgery. I made the mistake of doing a hair transplant in the frontal area and they, 10 years ago, put these ugly plugs in a few rows and now I've lost a lot more hair and it sucks. Not that you doc would use the plugs that I got, but the concept is the same; if they put hair in the front, and you nautually lose hair behind it, you'll be stuck with an unnatural hairline.
Get on some meds, and hopefully they work so you won't ever need a ht.