Phrases Asking for Help Politely

I'm not quite sure how to...

B2

Meaning

I don't know how to...

Example sentences

John: Can you help me with this software?

Alice: Sure. What's the problem?

John: I'm not quite sure how to use this particular function.

Alice: Okay, let me show you. It's easier than you think. Sometimes I'm not quite sure how to do things at first, too.