Sounds like a plan.
The guy you're working for may well be good experience but in terms of what he's saying, in England anyway (NI might be different) you cannot be an 'apprentice' unless you're with a company cards-in. Since a proper apprenticeship is the only way in in your country i'm going to assume that you would never be seen as fully qualified if you did it his way. Maybe ring up the people who deal with registration in your country and run it by them?
Maybe ring up colleges and tell them your situation - sometimes they get firms contact them and they can put you forward as a potential apprentice.
With already working with a firm i think you'll be fine, but i would start putting out CV's right now. The fact you're already in work as a spark's mate is a huge bonus. Put in your CV what you can do or have experience with - something like:
Experience in installing:
- Plastic PVC conduit installation
- Fused spurs
- 2.5mm ring finals and radials
- CU wiring
- Downlighters
- Shower installation, both wiring and mounting
- Basic plumbing, carpentry, flooring, demolition
- 2 and 3-plate wiring methods for lighting
- SWA