No way. I started learning computer science on the job when I was older than you. I took my time, asked questions, studied after work every day, got a better job, which led to another better job and another. In just 6 years of working my ass off, I've been able to rise the top of my field in IT. You can do it. Anyone can. Perserverance is the absolute key. When it gets hard, and it will... just believe in yourself, and do it anyway.