Well Idk how to use VPNs either, but my dad doesn't allow hamachi. He doesn't like it, he says someone on the network will hack our computer, and actually I think thats true.
yeah, hamachi does allow easier access to your computer due to the nature of the way it works.
i would like to point out that VPNs, which is what hamachi runs on (?), will be no more secure than hamachi.
also, there isn't a way to achieve the affect you're looking for without VPNs/hamachi.
I think.