Kyalami - don't attack the braking zones too aggressively. It's all rhythm and smooth.
Turn 2: brake early, as it's off-camber and downhill. Take it easy, it's a tricky one.
Turn 3, take a bit of grass on the inside, and try not to run too wide, although you can usually get away with putting a couple of wheels on the grass, its not worth it when you're learning.
Turn 4, run ever so slightly wide on the way in, but don't attack it - keep the car neutral (just enough throttle to keep the speed stable) until you reach the apex, then thottle hard.
Brake easy and neat for the 90degree left hand hairpin thing (haven't made my mind up what it is) keep it tight on the inside, until you're nearly out of the corner, don't poodle around the outside scrabbling for grip, it doesn't work at such low speed.
Neat and tidy for the chicane, don't try to overdrive it.
Final corner, turn in late, clipping the apex about 2/3 of the way through the corner, by which time you should be on the throttle until you get to turn 1