I'm 41 and I am doing a CCNA course run by www.skillstrainuk.com.
It is very good, you get access to tutors who are very helpful, all the course material, access to the Cisco academy website, online labs using real cisco equipment, not simulation programs.
There are two things to consider - it will take up a lot of your time, so you have to be committed.
The cost - about �3500, payable in the form of an interest free loan @ �100 per month.
I already work in IT and I am doing this to advance my career, the only thing I would check is to look at job adverts for Cisco engineers and look at the required skills and ask whether the course covers these.
They also do the A+ and Network +, so they may suggest you start with these first, they are also probably cheaper.
For the Cisco course, they offer a guarantee - if you complete all the material and pass the external exams, they guarantee to find you a job, or refund you the course fees.