You are better off stopping Dutasteride and sticking with Finasteride. If your ED problems are not resolved in 2 months, you should discuss with your doctor about stopping Finasteride.
A hair transplant works well if you are over 25. If you are under the age of 25, you should not have a hair transplant because if you continue balding behind the corrected hairline, and it will not look normal. Consequently, you will be chasing hair loss as you age. Similarly, if you have a hair transplant before your balding pattern become evident, then you will be chasing hair transplants for the next decade.
If you decide to get a hairline advancement surgery, you may see a scar.