Am I too old (29) to get into database administration?

I’m in need of a career change and am interested in web development and database administration, but I have zero background or experience. This type of job has been ranked highly by the Department of Labor and numerous websites touting its income and long-term growth and demand. But would starting now be impossible? I know that nothing is truly impossible, but is this feasible (while working full time, too)? by the time I finish with the fundamentals, I’ll still be that far behind everyone else, and most likely the technology will have changed. However, if it is possible, how long would it take to be competitive when applying for jobs? Thank you!