Before you commence with any automotive repairs you must first consult the knuckle gods. Privately you must let them know you are willing to sacrifice the flesh from your knuckles in order to gain mechanical wisdom!
I vould vecomend getting a VW bug, or a Rabbit/Scirocco to begin your on za job training. Haynes company produces zome great materialz for tzese products and it vill break you into ze German vay ov doing zings!
I vould stronlgy suggest you study za viring because it iz consistent through all ze German carzzzzz! Besidez zat is vhere you vill fiind za most fun vhile vorking on ze carz.