Honestly i did not understand why you went for a hair transplant, as your original hair looked really good. But now that you have undergone it, do not get over stressed, try to calm yourself. Stress is a huge impediment for hair growth. I underwent a hair transplant not at a young age as you, but at 40. The reason for the results you see is also due to my positive attitude in addition to following the prescribed medication.
https://bellatory.com/hair/My-Daily-Experience-post-FUE-Hair-Transplant
https://bellatory.com/hair/My-Daily-Experience-post-FUE-Hair-Transplant