Figure out a way to foster a popular gun culture, encourage people to use their weapons at firing ranges, and openly talk about gun ownership pretty much everywhere.
Figure that out without increasing government involvement, and I'll support that method over my idea for a "driver's license" like license.
I don't need to figure that out, because I live in Utah. We have a popular gun culture, firing ranges, and you can usually strike up a conversation with just about anyone on the merits of a .308 vs. a 30.06
So, what method would you propose to use to foster such a culture in Hawaii?