Make sure your drivetrain is lubricated and shifting properly.
Position your front wheel about half a wheel-length behind the rider in front of you to start. As you gain confidence, you can move closer to maximize the aerodynamic benefit. My Bike
Before joining a group for drafting, ensure your bike is in safe working order using an : Make sure your drivetrain is lubricated and shifting
Ensure brake levers don't touch the handlebars when squeezed and pads are aligned with the rims. My Bike