I would highly recommend living at uni, it's one of the best things you can do, especially when you want to experience something that is out of your comfort zone. At first, you might be a bit nervous but once you realise that everyone around you is in the same boat, it's plain sailing making friends! The costs of University definitely vary depending on the area and individual accommodation choice but all-in-all, accommodations in London tend to start at around £120 and they can go to towards being £250+ a week. The standard rooms in Kingston University's Clayhill & Seething Wells are just about the same as an average bedroom that you would get, but the toilet is built into it as well so take that into account. I'd recommend you look up the accommodations for the universities you are applying for, it will give you a much better insight. The main responsibility for a university student is staying organised and on top of your work, as long as you do this, you should succeed. In terms of living out, you have to make time for cooking and also cleaning the kitchen if your flat has a rota.
Universities tend to use a network for Eduroam, this internet is very high speed and it rarely fails, the best thing is that once you connect once, it will automatically connect whenever you visit another university or campus.
As far as I'm aware, they do not have content filters for downloads or viewing YouTube or Twitch, or apps like Steam
If you have any more questions, let me know!
Amit - Official Kingston Uni rep - Pharmacy Student