Phrases Asking for Help Politely

I'm not quite sure how to...

Meaning

I don't know how to...

Translation language

John: Can you help me with this software?
Alice: Sure. What's the problem?
John: <b>I'm not quite sure how to</b> use this particular function.
Alice: Okay, let me show you. It's easier than you think. Sometimes <b>I'm not quite sure how to</b> do things at first, too.