kerbal-tutorials
5. Mun or Bust - Understanding Patched Conics & Landing on the Mun
4. First orbit - Getting into a stable orbit and understanding orbital dynamics
3. Flight Controls - How to launch a rocket and (maybe) not crash
2. VAB basics - Designing your first rocket and understanding different propulsion types
1. First time booting the game - What should I do and what mode should I start playing with?