As a guy who dicked around in college semi-serious on my dad's bill for the first 4 years (8-10 credit hours per semester and getting a 2.1gpa avg) I will give you some advice. Take it seriously! One day my dad showed up at my house (nearing the end of that 4th year) and cut me off completely due to his disgust of my performance. I had been there 4 years and was really only halfway through school. So, I got motivated, got student loans, started taking 18-20 credit hours and went 3.7, 3.8, 3.6, 3.8 to finish out my schooling and graduate while hitting deans list 3/4 of those semesters. It changed my whole perspective on shit, nor to mention I met a couple very influential people during those 2 years.
So, I got out of school when I was 25 and I felt "late to the game". My boss was younger than me, and I felt like I had missed out on so much opportunity because I fucked around too much in school. So what did I do? I fucking killed it! I got a recruiting job (similar to sales) and ducking murdered it. Being the risk taker that I am.... I worked there for 2 years, then took a chance and started a brand new firm with an old guy that had some money. Today, (5 years later, 7 total including my first job? I run shit, make really good money, have full autonomy, and the trust from my CEO that I am going to continue to explode ( exponentially) this company from the ZERO that I started with.
I'm here to say that anything is possible with the right direction (from people) as long as have an idea or a vision of what you want to do. The key then becomes the hustle ( or execution).
As far as degree, if you aren't interested in a specific degree (CPA, lawyer, etc) then get something that has to do with entrepreneurship, sales, or marketing. Virtually all jobs you see involve skills that lay in a selling capacity when you first get out. But really... Fuck it, my degree was in fine art.
But trust me man, it's not too late, you just gotta "play fast"