I'll try to explain the steps of a safe rocket launch and recovery, in the following procedure:
How to launch and recover a rocket
Step 1: Set up launch pad and insert the engine into the rocket.
Step 2: On the opposite side of the rocket, take off the nose cone and insert the flame retardent paper. Push it down as far as you can.
Step 3: Insert the ignitor into the down facing part of the engine and insert the plug. Make sure the two wires of the ignitor don't touch.
Step 4: Attatch the two clips to each wire from the ignitor. Back away from the rocket.
Step 5: Have a friend insert the safety key in the launcher and begin the countdown. When the countdown ends, push down on the launch button.