My 4 month old never naps 😭

How do I get her to nap?? It doesn’t seem to matter how early we wake up, she won’t nap. If she does it’s a 20 minuets little cat nap. How do I get a nap routine going with her? I put her to bed at night between 8 and 9. I’m so lost and running on low today because momma needs a nap too!!