A little care should be taken when one uses a nail drill lest your nails or the skin are damaged. Always start it on low speed, especially if you are a first-timer. Keep practicing on that lower setting until you feel comfortable. Many manicure nail drills come with adjustable speed, so you can crank it up as you get more confident. Always keep your nails clean and dry before operating the drill.
In case your nail drill is fitted with an LED light, that might improve your line of vision, hence avoiding mistakes. Not to forget, replace the drill bits with a new one when necessary, depending on what task you are doing. Safety first—take your time to learn how to use the drill correctly.