Namaste
I will tell you a secret. You are now going to see the Mother. Let me tell you a secret of Kali of Bengal, She will be in that temple no matter what tradition, too. Some of the most powerful murtis of Kali Maa are made of touchstone, a black siliceous stone related to flint. It is used to test the purity of gold and silver by the streak left on the stone when rubbed by gold. Kali reveals things in this way. What this murti is made of does not matted, what YOU BRING will be tested by streaking Her. If there is devotion in it, then it will be Gold and Silver in tone. If there is no devotion, there will be no streak shown. You will not be judged if there is no streak. If there is, however, She will give you something in return.
Often near the main Murti, will be a smaller Chandi aspect of Kali in Her own shrine. In the Bengali tradition, the pujari for this Chandi is often a female pujari, so much for those who say women cannot take to the altar as priest of the Murti in the temple. Do not insult any women in the temple of This Mother. If Chandi is there, you do not need to give Her any food. All you give is to look into Her eyes.
There may be a women yogi of Kali there. You can call her Bharaivi.
The Pujari of Kali is a very special Pujari. Not just anyone can be a Pujari of Devi in Black. They are very specialized, special pujari. Be wise, and be good, to THAT pujari.
You can give a coconut, or a bag of sugar. You already know, you can first address Her as Bhavatārini. Oh Rest for the Universe. You can first approach Her when another goes there, stand just next to that person and just a little behind. It is very easy.
All the best! Jai Kali Maa.
Om Namah Sivaya