Am I Balding? I Am 17 Years Old. Should I Take Finasteride?

Your photos show a maturing hairline, not balding. If you want to find out if you have hair loss behind the hairline, then get a HAIR CHECK test (https://baldingblog.com/haircheck-test-how-it-is-done-and-what-its-value/), and then you will know for sure. The age of 17 is not too young to get finasteride if the HAIR CHECK test showed hair loss behind the hairline.