Question about my parakeet?

I got a 2 month old parakeet (I have No other pets) from a breeder a week ago. she is not afraid of us and is eating and drinking well. i have let her since day 2 and she readily comes out and flies/walks around. She likes to bite/chew and I understand its natural but she doesn't bite or chew on the toys she has. she chews on the carpet, towels, my hand etc and I don't know how to make her understand biting/chewing us is not OK. Also, she does not like going back to the cage. It is spacious enough for 4-5 parakeets. She keeps asking to come out but I can't let her stay out all day and she does not go in easily. Should I leave her in for a few days to get used to the cage and learning to play with her toys? We talk with her a lot and she sees us almost the entire day. I give her fruit/vegetable everyday even though I have never seen her eat anything but her seeds. She ate millet when i left it in the first day and then i took it out so she is not eating just that but giving her millet doesn't seem to interest her.. I need advice on her biting/chewing us ( I understand she WILL chew something), getting her back in the cage without struggle and also eating fresh food. I know it takes time but I am kinda hoping to get some tips/pointers on how to encourage good behavior and make it more relaxed and fun for her and us...Thanks