

Не надо беспокоиться, всё хорошо.
There's no need to worry, everything is fine.
Тебе не нужно беспокоиться обо мне.
You don't need to worry about me.
Перестань беспокоиться, я уже дома.
Stop worrying, I'm already home.
"беспокоиться" is in the lesson "Verbs 17" (Level 29), along with 10 other useful words. LinDuo has 180 topic lessons like this one, 2,380 words in total. Every word has an illustration, a transcription and pronunciation in a female and a male voice. Just 10–15 minutes a day is enough to learn them all. Free, and works offline.