How to pray to KrishnaKali?

I am a devotee of Lord Krishna and love him so much I cannot explain. I’m not a full pure devotee yet but I’m striving to be one day by day. I let go of a lot of things materials in my life and have never been happier. It’s been a year of being a devotee of Lord Krishna. Recently however I’ve been getting a calling to pray to Maa Kaali. I’m not sure where this came from but I just really feel like praying to her more and being in her shelter as well. I really love her essence and a part of me wants to start devotion to her. I’m a 20F in university rn so I’m wondering is there a way I can pray to KrishnaKali because I know there is a form where Krishna and Kali are prayed together as one. Can someone advise me about this? Idk if this is just a temporary feeling I have but idk I just want to know if I do strongly get these feelings more, then how should I pray to KrishnaKaali. I obviously will never stop my devotional love for Krishna but a part of me wants to incorporate Maa Kaali worship as well recently.