Congrats on getting into this top uni! You must be really excited. I am not a student there nor am I going there, but my sister lives in Cardiff and I have spent quite a bit of time in Cardiff. I presume you can get some uni-owned accommodation? Anyway, most students live in Roath, which is a lovely area near the centre of town with old, 19th/20th century terraced housing. Riverside is also nice, a bit further away via a big park. It is a lovely city for both culture and shopping. There is a really excellent fine art museum and the Mermaid Quay is also lovely for food and just looking out to sea. You can do boat tours. There is a lovely castle and St Fagan’s Museum is a bus journey away (it is a huge, outdoor museum). You could not possibly ever be bored in Cardiff and there are plenty of interesting volunteering jobs and paid work too. I hope you have a wonderful time in Cardiff, you have chosen well!