first budgie

Hi, everyone! My name is Rebecca and I have recently become the loving mom of Lemon the Budgie. As Lemon is my first pet bird, I wanted to join this forum and add to all of the research I've already done. I've had him (possibly her) for two weeks now, and we seem to be getting along quite well...

I got a new budgie three days ago, and I can't tell if he likes me. He's my first bird, and I still don't really know how to read budgie body language :/ He stays in one part of his cage for a long time, only moving his head, but sometimes he'll fly like a maniac from one perch to another over...