Nobody expects a 21 year old to have his life figured out and nobody expects 21 year olds to change the world on day one. Do your new job, try to do well, there's tons of skills to be learned in sustained work on the same codebase every day as opposed to the presumably bursty pattern of university projects. Be humble about the fact that getting a good degree is just the beginning, nobody knows everything at 21. Just because you're working a something less than your dream job doesn't mean your dream will never come true. Work on your socialising skills and in 18 months do another round of applications. Or save up some money and go sit on a beach in Thailand for two months. Whatever, you're young. Just don't tie yourself down with car payments, mortgage, wife, kids and golf clubs until you're ready to settle.