You hardly can prevent your drone from crashing and breaking some of the propellers, or even the body. The damage will depend on the crash and the height it falls from. It will also depend on the surface your drone lands on or crashes.
The best place to fly a drone is open fields where there are no trees or any electrical wires hanging. Do not uplift the drone with high throttle at first, increase the throttle gradually. We will know about safe throttling later. For now, you can use the Stabilize mode first. Just remember, throttle is nothing but speeding up the velocity of the propellers of the drone. If you are a beginner, my suggestion is to learn how you can levitate your drone above the ground. Once you master hovering the drone, increase the throttle a little bit. Practice more with that high. Increase the height gradually. Then, start doing...