(Reasonably) accurate 1Hz clock generator
Is using a quartz crystal 32kHz a good way of producing a 1Hz clock signal for my FF's

Yes, that is the way to do that. You probably haven't met the 4060 CMOS logic chip yet because it can do most of what you need.

Look at page 8 for how it can use a Crystal as the input clock. It will divide down that clock with a series of flip-flops by \$2^{14}\$ so you'll get 2 Hz form a 32768 Hz (watch) crystal. So add another divide-by-2 and you're done.