Working a temporary job can be a great way to get experience in your chosen field while opening up the opportunity to be hired permanently.
I really can't stress enough how a temp job can increase your chances of finding work in a new career. Many employers want to try out someone before hiring them, and, if you perform well, you will be their first choice for a new hire.
The key is, of course, if you perform well. It's absolutely important that you treat your temp job as if it were your permanent job. I've been at numerous companies where the temps strolled in a few minutes after the start time, left early, or took numerous days off. That won't get you anywhere but in a new temp job. If you act as if you are a permanent employee, people will start seeing you as a permanent employee.