Guess what I'm bad at?
Making choices.
You have to fuck up to succeed. That's the simple fact of life. Yes, you may be like your brother and have troubles finding a job right away - but hell, everyone does. But everyone eventually
does find a job, and a job that they like.
What you could do is work on your communication skills, and your first impression skills. Smile more, eye contact... that sort of thing really stands out. Talk to your friends and find out what you do
wrong and work on actively fixing those.
School, as you know, is a matter of prioritizing time. Don't be a dumbass and study all the time or never - find a happy medium between your studies and having fun. Play that weird game where you post random monsters here in Pages for an hour a day if that's what stops you from completely burning out. Be a candle that's half gone - not running on full power, but not at the end either.
And don't push yourself to do a BS in 3 years if you don't think you can. College is more than just getting a degree - it's about finding yourself and having
fun. Go out and get drunk once a week, puke on the side of the road if you must. If that means that you do your four year degree in - gasp - four years, then so be it. You do not want to kill yourself - physically, mentally, or literally. They're going to continue offering your classes, so take 16 credits instead of 18.
tl;dr - don't freak out. You'll make some bad decisions - a instead of c on a test, drinking too many tequila shots, making a pass at the wrong person, acting like a fucking retard at an interview - but in the end, you'll learn from everything and become a better person.