It is quite natural to be scared and apprehensive - the outcome is never guaranteed. That's life. You take a gamble and live with the result. The FUE scars will be less noticeable in the long run and even if you go to a 5 or 6 you'll still have hair covering them there. Everyone has gone through your dilemma. Keep doing research, accept nothing less that an approved, world class surgeon to minimize your failure quotient, and make your decision. Don't go cheap or close.