In the first stage, you need to remember 7 steps. 

First one, you need to wear safe clothing and eye protection. It protect you from the chip or dust.

In step two, remember to wear ear protection if drilling regularly because a handheld electric drill can cause earing damage after prolonged exposure. 

The third step is that you should wear breathing protection. It protect your lungs.

Next one, choose the correct drill bit because using a bit made from the wrong material can cause the bit or the material you’re drilling to break.

Moreover, fit the drill bit firmly into the chuck. Make sure the bit is straight and secure.

After that, clamp small pieces firmly together. Do not hold the piece down with one hand while drilling, as the drill could slip and injure you.

The final thing you should remember is that you should handle the cord safety.

In the second stage, you need to remember 5 steps.

Firstly, drill a pilot hole because it will help prevent your drill bit from slipping, and reduces the chance of splitting wood or other damage.

Secondly, drill with steady pressure. Remember to hold the drill steady and push it into the material you’re drilling.

Next, adjust the clutch. Look at a series of numbers on drill, you can lower or higher the torque.

Besides, avoid overheating the drill bit

Finally, do not force a jammed bit through. If the drill bit gets stuck in the material, don’t try to force it out by running the drill. Unplug the drill, separate the bit and the chuck, and remove the bit using manual tools. 

That at all about how to use a drill safely.