Hi I am also an international student (From Asia) currently in my first year of Physics with Scientific Computing at Bristol.
My experience so far has been far from normal due to covid so keep that in mind.As for your statement about the 70% physics, I would say its more like 50% physics, 30% maths, and 20% computing, at least in the first year and I think the second year too. The experience is indeed very similar to students taking the normal physics course for the first 2 years, but changes in the third and fourth years as there are many more options for computing, you can see all of them on the course website.
All my lectures were delivered online, but from what I can tell the enjoyability of each module is largely based on the lecturer, and you change lecturers decently often for the main physics module. In the first term I had 2 different lecturers and 3 different ones for the 2nd term.
The tutorials are biweekly for physics and computing, with a weekly maths tutorial. The tutorials are in much smaller groups and a lot more interactive, I found the math one especially helpful and is a good opportunity to ask questions. Although if you ever have questions you can just email the professor. There are also biweekly workshops for math and physics alongside tutorials and lectures which are also smaller group classes where you can meet other students and interact with a teacher. The computing module is run entirely through a weekly workshop, which I find very effective as you always have help available and you work through the content alongside everyone else.
I haven't been in many in person classes on campus, but I have been to a couple study centers/libraries and they are very convenient to get to and use, and usually have lots of space/free desks.
As for accommodation I stayed in The Courtrooms, and from what I know a lot of international students tend to stay in the city centre, as the accommodations are newer and they tend to have ensuite bathrooms. Life in the city centre is quite nice all the shops are in walking distance and so is the university. The other residential villages require a bus to be taken to get to campus, but the buses are decently frequent. The Stoke Bishop/Clifton residences are a bit more social, however I know of two international students who moved out from those residences to the city centre within the first couple weeks as they hated it there. They said there was constant partying and noise late into the night so they couldn't sleep or study. The city centre accommodations are a bit more expensive though.
I hope this is helpful, feel free to ask if you want to know anything else.