Tip?Conditioning over time
And since you are going into the army soon,it will be a great time
to condition yourself to it.
Another tip
K,when you step into the shower,let the jet of water from the
shower head spray for around 15 seconds on one of your arms.This
will let your body be accustomed to the cold at an area that is not
that sensitive,so that when you shower the rest of the body with
cold water,the body would already be more accustomed to it and the
shock from cold water is not that high.
3rd tip
If possible,get towels that are huge so that it is those that can
cover almost your whole body,wrapping your body after the cold
water bath will almost immedately trap body heat and soon the
feeling of coldness will be gone.