Hello and welcome. It is exciting isn't it. And that wave of love and protection comes over you. She is very tiny! I didn't know they sold them that young.
Just make sure she has plenty of substrate and torn up white toilet paper to build a nest with, and she should be fine. Also try and keep the cage layout so she doesn't have any fall risks with her being so young. So no high levels or ladders with spaces between the struts
