Balding at a young age

As a 21 year old who is beginning to experience male pattern baldness, I’m left wondering what the best course of action is. I have a full head of hair for the most part, but it’s thinning and a couple small bald spots are forming around the back of my head. Would it be best to accept the inevitable shaved head now and just go ahead and do it, or should I keep walking around with a head of thinning hair until it gets extremely noticeable before taking the leap?