21 year old pet with a cat, looping for accommodation in Stuttgart

I'm a 21 year old woman with a precious cat named Leeloo. I'm Mexican and study architecture. I would like a place where there is enough silence to study, probably where there is a park or something near. Also, an Ubahn, Sbahn, or bus station near, so I can get to muy university in the quickest way possible.

Most of all a cheap and nice place. That's all that matters right know. Thanks!