I am struggling to love my mini Australian puppy

There are times when I’m happy and adore her but rn she’s driving me insane. She chases the cats. Has random spurts of energy even though I take her on walks. Wont listen to me and is starting to bite me but in a playful way(but hurts) I try to train her but her attention span is extremely short. Idk what to do. I’m barely getting any sleep and feel like I can’t do this.

She is 3 months almost 4.