How Much Mobile Data Do You Use in the UK?

Heading to the UK on exchange in Spring 2024～
For those of you who've lived in the UK, how many GB of data do you use a month?
(I'll be there for about half a year)

I looked it up and unlimited plans are so expensive… around 2000NTD? I'm super scared of getting lost + suddenly losing my connection…
So I'd like to ask how much data you all bought?
Or which carrier do you all use?

Thanks so much!