A gradual buzz can't hurt....even if you never go all the way sly, a buzz would be an improvement.
Whilst I think the advice given here is sound, I have a standpoint that says, "Every man should at least try it once in life." So my take is, if you are toying with the idea, "Take it all off". You are young so this will be a perfect opportunity. Thereafter, you will be the best source of your own advice to yourself. You will know inside whether you should keep the look or grow it back again. You have a whole life time ahead of you to experiment.
If you are thinking of shaving your head I'd say go for it. You'll always wonder if you don't. A buzz looks great but a shaved head both looks and feels great.