+1 to this. Take some time read the literature/empirical evidence on finasteride, to be sure it’s something you’re interested in. Do not go to propeciahelp or other fear-mongering sites for your information; You’ll receive skewed/biased perception of the drug. But, you should be self-informed on the topic in preparation for meeting with a physician.

Again, if you’re wanting to go the preventative treatment route, the earlier you start the better, obviously.

Your hair is way too early along to be even thinking about hair transplants.