How to care for my baby molly?

i have a 65 gallon freshwater tank which includes swordtails, danios, tetras, and mollys. I thought my fish was pregnant but was not sure since the mollys are a new addition. I saw today that there was one little baby and went to the store and bought a small ornament for a hiding place too small for all the other fish, i know the other fish might get him/her as i was very unprepared (just noticed she might be prego 2 days ago) but since the mother was just bought i am uming that she might have more, or at least that's what i heard through research.. what steps can i take to care for them or this one if still alive?