I'm a beginner player of KSP, and I just recently have put my first crew of kerbals in orbit. I used what could be described as a space shuttle rip off, launches vertically, but the actual shuttle is mounted on top of what can be called an Atlas V rip-off, and now I say "What's next? THE MUN OF COURSE!"  
I wouldn't send my beloved Jebidiah on such a dangerous mission though! I'll use a robotic mission to see what I'm dealing with first. 


My goals, I want to first send a spacecraft to the mun to intentionally hard crash into it, to demonstrate my ability to reach it, then I want to send on orbiter spacecraft, finally, I'll send a lander to the surface. (All will be robotic.)


But my question is: what is the absolute easiest way to reach the Mun?