Basic Flight Simulation - plaa/Modular GitHub Wiki
Since we've got pre-made example designs to play with it might be better to start off with running sims instead of designing a rocket, but it'd probably work well either way. Use the 'A simple model rocket' example design to take user through the Flight Simulations tab, the Launch Conditions tab in the New/Edit Simulation window (including the effects of the different launch condition options) and the process of running some basic sims using different motor configurations and what the results mean.