A concealed firearm license and a 44 caliber handgun stored in your driver's door compartment will take care of any fear of being jacked.
As for the knuckleheads you have the power, the steering and the braking ability to avoid any knucklehead!
Letting it sit isn't good for it at all. The seals don't get lubed in the engine or transmission/torque converter. Your tires get flat spots, look at floor in your garage. If it's concrete look at where your tires sit. See any dark spots? That's the oils in your tires leaching out. Not good!
I'm rather a newbie here too. Welcome to the site. Take that great car out and enjoy it, that's why you bought it isn't it?