I'm fairly new to aftermarket CPU cooling, how would someone go about putting fans on that?
Most aftermarket HSs come with their own fans, though it'll say in the heatsink's manual what size fan (80mm, 120mm, 140mm) it takes, and how many. Sometimes you don't even need to use a fan on the heatsink (I don't on mine), if your case's airflow is good enough.
The heatsink will also usually come packaged with little brackets to attach fans, though if you really need to, you can tie the fan(s) on which zip ties (not a perfect solution though).