As long as you don't end up with the nickname "TCX" where X is the initial of your Surname.Don't bother. You will end up with at least two nicknames - one from the Officers' Mess and at least one from the rest of the unit. They may or may not overlap. The rest of the time it will be first name or Sir.
We had "Swiss Tony", "Half man, half doss bag", "Noodles" and many more besides.