Picking an arts degree wasn't you first mistake. It was a consequence of earlier mistakes. Your mistake was thinking you could go into, say, a CS degree and have nothing to learn. I'm sure if you did a 100 Intro to Programming course you'd breeze through it but programming != CS. The worst thing you can do in college, at a job or even in life is to go into a situation thinking you have nothing to learn. That's just a…
I made this exact mistake at 17/18 and even had a very similar line of thinking as OP, but my decision was not to go to school at all.
I ended up in the industry a few years later, but have had a mostly crippled career. It was unfortunately drilled in my head around the time that people were handing out six figure salaries to anyone who could remotely program regardless of education.