I'm now in my 3rd year, and I had a similar-ish experience in my first year. I was on campus in halls, but the people there were so unlike me. They too were out all the time (at the beginning), drinking, noisy, banging on my door at 4am etc (dangerous for me due to health). For me at least, it did get better. After freshers they chilled out a lot, and then throughout the year everything was so much calmer. I hope this will be the case for you too.
I too was very anxious, I considered dropping out more than I care to recall. But once lectures started and I had something else to focus upon, it really helped. My biggest tip: do not compare your social/living/general life with others at uni. This is what made me want to leave the most, but acknowledging that not everyone is socially inclined in the same way is important. Take time to do you, but also at least form some friendships/acquaintances so that you have the opportunity to be social.
It's really good that you've attended daytime social events (they don't even really exist here so appreciate them!) and enjoy exploring the area. I don't know the area you are in obviously, but maybe find somewhere that you can go (safely) to relax/get away for a bit. For me, there is a local beach/woodland that I go to. It really does help as each time I visit I associate the place with feeling calm(er).
Unfortunately I cannot give any advice regarding your accommodation/living situation as I haven't experienced anything like this. Just make sure you are safe. If you feel unsafe or are unsafe at any time, contact your student services, I am sure they will support you if and when needed.
I really hope everything improves for you soon. All the best.