There's four guys you need to take pictures of. Jizzy the Pimp, Ryder (Eazy E), the Mexican guy, and IIRC Mike Toreno (white guy). Just zoom out and constantly look around for cars showing up. Cesar provides running commentary on the people you need to take pics of, so it makes it a bit easier.
I also didn't think the driving school was too bad. Not even close to the insanity that is Supply Lines. I still hate that mission.