Need guidance,opinions,I want to know my flaws

Need guidance,opinions and help from brilliant designers on my Quote generator,im a learner - https://codepen.io/Idayatademefun/pen/JjMdEYw,

I’m not going to claim to be brilliant (just ask my wife) but I do think you need to make this more responsive. Right now it is a static box of 500px by 550px and stays in the upper left corner of the page. I think you want the quote box to be centered on the page at all times. So I would work on that first.

Yh,thank u for your help