Orbits are very non-intuitive until you've had a chance to play around with them, KSP did wonders for my understanding of orbits. Lots of people make the mistak

Orbits are very non-intuitive until you've had a chance to play around with them, KSP did wonders for my understanding of orbits. Lots of people make the mistake that once you're in orbit you can just freely move in 3D to wherever you want a perception not helped by the number of times movies show it working that way.