Tricky one, at your age I think that you will find it hard, nobody in this industry seem to be interested in investing in training people, most of the adverts I see on the FB forums are for engineers with three years experience or more. None of them are interested in taking on apprentices, let alone a mature apprentice. The wages for trainees is circa £18K, some much less some a bit more, most mature trainees couldn't survive on the wage. No certificate will help you either, without experience you are an expensive asset, the cert shows you know and understand the rules, but experience shows you know all the things you cant learn in a classroom like the product for example.