Sorry, but I think it is more important to educate yourself about the reality of voting third party. You want to know about the Libertarian party? Fine. They have some stuff right:
Less foreign war
Minimal 2A restriction
Legalize drugs
Legalize prostitution
Legalize assisted suicide
Minimal government intrusion into most aspects of social life
They have other stuff wrong:
Less government regulation
Deny overwhelming evidence that Keynesian economic theory works in practice
An unhealthy obsession with returning to the gold standard
Take foreign policy too far towards isolationism
Except Gary isn't exactly inline with the Libertarian standard. Both Gary and Bill Weld are essentially republicans with social liberal views (gary moreso). You have to look at Gary's stances on issues, not just the Libertarian party.
Also, Gary's resume and successes are hard to look past. It's remarkably better than both Hillary's and Trumps, and not only is he the only one with true experience with being a governor, he's also one of the if not the most successful governor in history.