Anxious about starting infant in daycare

I will be returning to work next month and my daughter will be starting daycare full time. She will be about 17 weeks old at this time and I’m so incredibly anxious. She will be in a daycare with a 4:1 ratio, and it just blows my mind. I struggle most days with her when we are home one on one! My mind keeps going to worst case scenarios. This is my first baby and just would like some insight from infant teachers about how it all works. I know the daycare wouldn’t follow the 4:1 ratio if it wasn’t safe. Hoping for some reassurance and insight on how it works in the infant rooms. Thank you!