I can only speak for myself. I believe the role of defense can be achieved through voluntary institutions.
2.would you say libertarianism is more left leaning or right leaning?
There are elements of both but I don’t think the whole left/right axis is very sensible, libertarian/authoritarian is a better way to look at it.
No government at all. I used to be a minarchist but now I’m a full on anarcho capitalist.
I used to be a libertarian leaning conservative.
5.if you did switch what party did you switch from?
Republican