My advice is stay drug free and do not drink alcohol.
Some universitys have quite a problem with alcohol and even drug abuse. I think these things mess people up.
My advice is make a point of going along to all teaching events, you might meet people you get on at lectures, in lab classes or tutorials.
Also join a club which is about something which interests you,
As an academic I know something, the ideal student is one who studies hard and also enjoys their time at university.
There is a saying
"All work and no play makes jack a dull boy"
I reply to this with
"All play and no work makes jack fail his exams"
What you need to do is to strike a healthy balance between work and play while you are at university.
_________________
Health is a state of physical, mental and social wellbeing and not merely the absence of disease or infirmity
I am not a jigsaw, I am a free man !
Diagnosed under the DSM5 rules with autism spectrum disorder, under DSM4 psychologist said would have been AS (299.80) but I suspect that I am somewhere between 299.80 and 299.00 (Autism) under DSM4.