Hi @user87464739 😄
I lived in halls for my first year, and in my experience there were quite a few mature students who lived there too, including one in my flat. As a non-mature student, I didn't think much about it and didn't treat them any differently than I did my other flatmates.
Saying this, it's all about your comfort, and what you wish to get out of your accommodation. If you want to make friends with your flatmates and don't mind them being slightly younger than you, then I would say university halls of residence is the most common and easy option. However, if you'd rather more privacy, then you could find a studio apartment, whether private or sometimes with certain university halls they also have studio apartments to rent. I would definitely research the accommodation options in the area you will be studying and maybe try to talk to the accommodation team at the university.
Wish you well,
Jen (UoS student rep)