Tummy time

So, my little one is going to be 5 mos on Friday (3mos technically - preemie) and HATES belly time. She screams and cries. she'll momentarily be okay when I praise her for doing the superman. She hasn't gotten the concept keeping her legs down and pushing up with her arms yet. Anyone have tips to make this a better experience for her? She's very strong and holds her head with expertise but isn't pushing up yet. It doesn't matter the time of day or how close or far away eating is, she's always mad. Even if I get down there with her.

Thank you in advance!