Thinking of gifting my little sister with a computer

I want to get my little sister a MacBook Pro or air or something nice like that (this is her last year of high school and it would be like a birthday gift/ graduation gift) I moved out but we grew up poor and I think this would be a nice surprise for her I would have to get it on credit and my question is if I get it for her will she get notified when I am supposed to make a payment or would it be separate? I don’t want her to have to be constantly reminded of how much it is or anything I just want her to be able to enjoy the computer