The "figure 8" pattern is what's known as a free return trajectory. That means that after the ship departs low Earth/Kerbin orbit, if it makes no further course changes it will fly round the moon/Mun and land back on Earth/Kerbin. In the real world that's safer - should the engine break the astronauts will still get back. Indeed Apollo 13 employed it, though when the explosion happened they'd left their free-return course and had to use the landing engine to get back on track. In KSP it takes a little bit of precision to do this, so I suggest not worrying for your first mission. Simply try and get on a course that passes low over the Mun, then burn retrograde there to enter orbit. As for landing site selection, http://www.kerbalmaps.com/ may help. You can send unmanned probes first. And you might do what I call a "stop and drop" landing, where you reduce your orbital speed to near zero when you pass over a suitable site then descend vertically. That's not very efficient but it's simple.