I have that qualification, all I got from it was a royal pain in the Arse. Working as a car mechanic is only worthwhile when you get to be master technician level. Which is many years of busting your balls, working for peanuts and taking ****.
It's not worthwhile, I regret the 4.5 years I wasted as a mechanic in training and then in industry.
My advice? Go to college, get what you need to get into university for the degree and get that. Part time job while at college will get you as much as an apprentice wage would aswell.
The course is basic in its realist sense. I passed every section of it with a distinction, n that's not even trying. It will not advance your mathematical ability at all, which is what the college and uni courses will mostly require and look actively for