What would be good for my hair?

Ok so I am an African American, and I want something to use to help strengthen and grow my hair. So far, I have been using , Smooth'n Shine Therapy Silk Infusion 60 second Critical Repair. It has made my hair glossy and extremely soft. But, I want to know what I can use as daily grease to help strengthen (something with olive oil.) I've heard of Jojoba Oil and Olive Oil but I can't seem to find the jojoba oil.