Good point, though you generally don’t really have to handle coolant for mini splits, they come precharged. You mainly have to add more if you have a longer lineset.

I’ve heard the online EPA course/test for coolant cert is pretty easy, though.

The main thing is just making sure you test the lineset well, including deep vacuum decay, and ideally a nitrogen high pressure test.

Even where it's not legal you can often do much of the work and hire a licensed contractor for the "final step". It can be worth asking around.