How to care for belly button piercing in the shower?

Yes I'm the same female that posted in the other post. I have another quick   question. My piercer never told me anything about using sea salt with warm water or using antibacterial soap to heal the piercing all he gave me was the cream. My question is im scared to risk it in the shower so I'm gonna have to be careful while using my shampoo and conditioner.  But I need to shower I don't wanna smell lol I don't have antibacterial soap I'm gonna have to buy that tomorrow so for now can I just use water?  I just got mine pierced yesterday.