If you gave up after one knock back I wouldn't employ you.
Get in touch with electrical training providers. My Sister sells training for a living these days (office stuff) but there are loads of grants available. You might be able to approach a company and when they say 'no money after 25' you can produce something that shows you get a grant.....
I studied Electrical and Electonic Engineering, now work for the largest (I'm sure) oil service copmany in the world. We hire a lot of older Techs / Engineers.
I actually asked my dad about your situation - he owns a large electrical company (Explosion proof, panel building, Control, design, service, install and maintenance etc etc) with bases in the UK and Middle East. He said he'd have no issues with age 'as long as he was a grafter'