At 35 I highly doubt you'd be accepted into an apprenticeship. But each company has their own guidelines on apprentices...
Failing getting an apprenticeship, youd have to do it the long way (Assuming you want to be licensed)
Try and find a job as an unlicensed mechanic or fitter, gain experience & record it. Self fund your theory towards the license of your choice (or see if the company will help you), apply for it then seek a job as a licensed engineer.
I dont have a great deal of knowledge in the trade, but thats one of the routes in, failing getting an apprenticeship.