attend this course before you can go hunting
And the Second Amendment is about hunting, how?
Here's the slippery slope a lot of well intentioned folks miss about allowing the government to control access to your fundamental rights. If they control access, they can restrict access. Just as if you can tax it, you can destroy it by taxing it so heavily that it's uneconomical.
Want to make me take a course in order to exercise my rights? How much is that going to cost me? And when are you going to raise that cost?
Pretty good example occurred in northern Virginia some years back. Several counties wanted to slow growth, so they restricted granting Building Permits to a trickle. Want to slow or stop any firearms transfers? Take NICS off line. In California, that would be all legal sales, BTW.