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Not sure of college. [Y12]

I've been in college [y12] for about a month now.
It's mostly fine but...

I used to only have to walk about 10 minutes to school; now it's an hour and a half, and it took my legs [and me] so long to not be in awful pain everyday after, as pathetic as that sounds.
I was picked on for most of secondary school and surprisingly I have not been able to stop being hyperfocused on what I am doing and what I look like in front of other people at all times and being constantly worried that I will be ostracized for doing something 'wrong' despite the fact I know well that no one cares about me at all.

I have made no friends and I had no expectation to be able to at all; talking to strangers feels borderline impossible to me, the one friend I had in secondary went to another school.

I know I'll be doing this every day for two years, for what? To get A-levels that are borderline useless; what the hell am I going to do with Media Studies? Regardless if I take it to university, I'm going to end up working at Costa at best for the rest of my life.
What is the point?