That will come in time. Best way to start is to get the 3in1 kits with multiple variations, as those kits (especially old 60's and 70s tools) will include lots of extra parts in one box.
Try finding the AMT Trophy series' kits that you like.
Examples include 53 Ford F100, 57 Ford Fairlane 500, 40 Ford coupe or sedan, 57 Chevy Bel Air or 59 El Camino. Great 60's kits that have stood the test of time.