good advice is the key i have been a mechanic for over 9 years, did my apprentiship with M.I.T.A. and worked for a nissan dealership.
I learnt all the basics with maintain a vehicle there then went chasing the coin up north working for rio tinto in one of there light vehicle workshops
it dosnt mater where you do your apprentiship because every car is different and they all have there problems
But you need to leran how a motor works before you can build a performance engine or anything like that and the best place to keep up with the tech side of the game is to work in a dealership because they invest millions of dollars in to there vehicles