How to do a transient simulation using LTspice?
You have no time-varying signals so you will get a straight line. LTspice calculates the initial operating point and nothing in your circuit changes from there. 

Add a step input or an AC input and you'll see something. Right click on your voltage source V2 and select advanced and make it time-varying. 

You can tell it to skip the initial operating point solution in the Edit Simulation Command dialog and set initial conditions using .ic directives but that is more complex and may not give you what you want.