There is nothing wrong with re-training as an electrician, your options are somewhat limited with age and or experiance.Personnaly I would stay away from the local ads such as "be an electrician in two weeks".
There is a lot of theory which at the time of learning you think you never need, but in the real world that theory allows you to calculate the requirements and do the job cheaper than a (well I have seen it done like this electrician).
Passing an exam which says you are now 17th edition or part p compliant does not make you an electrician, only experiance and the knowledge of your craft can do that.
If you are serious then learn as much as you can from people in your area, advertise your services free of charge on condition that you learn from them, don't forget to train you normally have to pay them, this way you get free practical training.
Enrol with a college that provides recognised courses many of these you can do on a night school basis or a full day, say once a week.
Whatever path you take remember that the first lesson every electrician learns is safety!
Never try anything you have no knowledge of, it could kill you, or even worse kill those you are doing the job for.