Take a crack at it.
Take a crack at it.
When someone says they're going to "take a crack at it," they mean they will attempt to do something, typically something they haven't tried before. Picture trying to crack open a nut; it's the effort of attempting to break through what is tough.
I'll take a crack at fixing this.
I'll try to fix this.
Why don't you take a crack at the problem before we call a professional?
Why don't you try to solve the problem before we call a professional?
She decided to take a crack at writing the novel she always dreamt about, even though she had never written before.
She decided to try writing a novel even though she had never done it before.