I've just finished first year and for me, the experience was pretty similar to that in the movies. But I did put in lot of effort into making sure me and my friends went out regularly (1-2 times a week) and just maintaining a good social life whether that be inside or outside, it doesn't matter.
With me, I like to keep a small friendship group so I had 2 good friends on my course and 2 good friends from my flat and then 2 good friends from other accomodations/ courses. I only really had about 6 people that I regularly hung out with (not all together because they didn't really know each other too well) and met a lot of other people through them so by March I had maybe 15-20 good friends and if corona hadn't happened, I think I would have made the summer term one of the best 3-4 months of my life
Uni is definitely what you make it, if you don't make too many friends don't worry about it, it will seem like everyone around you has 100s of friends but in reality, they also probably have many close friends, its better to have a few close friends who you can rely on rather than too many friends.
To be brutally honest, alcohol and drinking and clubbing do make up a BIG proportion of your social time and it is easier to meet people through pres/club events but again, if you don't like these things, thats not a problem as there are plenty of people in the same situation.
Uni and independence brings out a new side of many people, I found myself to become much more of a party animal and become way more provocative than I used to be and gained so much confidence. I struggled a lot with body confidence/ self doubt over how I look etc. but being at uni has truly made me come into my own and I've become so much more confident in the way I look/ dress. I also tried so many things that I never thought I would get to experience and whilst some of them should be things I regret, I don't really regret at all because it was still a good experience