For some, jumping right into a cold bath on day one may be too much of a shock. We suggest taking several days, even weeks starting with cold showers to acclimate to the practice before taking for first cold water immersion plunge. (Perfect time while you're waiting for your tub to arrive). When you are ready, start slow (with a short bath that is, 2-5 minutes), and work up from there, with 10 minutes being your max for a bath at 50-59oF.
For safety, do not practice cold water immersion in isolation; have a friend/partner close by to assist you if needed. Be sure to watch for signs of hypothermia and exit the bath if you start to shiver. Have your towel ready, and warm, dry clothes to change into after your bath.
Keep in mind that cold water immersion is associated with risks, particularly for those with high blood pressure or other health conditions. Consult with your physician before commencing any ice bath/cold water immersion activity or practices.