just buzz it shorter and shorter and then one day..... you won't got back, it just becomes you.
Alfy, Your hair looks fine to me like it is. You said you are used to having long hair and are not used to it being so short yet. When April comes around, see if you think you need more time to adjust. You may be ready to shave it by then, but if not, keep it as is for as long as you need. It looks fine, so you could wait until it starts to thin out a bit more before making that final decision. I think it is good to have an adjustment period if you can. Yes, you can grow it back if you don't like the shaved look, but why not enjoy the super short look for a while first?