Learn English – How to express you are not familiar with a field

expression-choicephrases

I want to use this phrase: a lack of knowledge in ( ), but I'm not sure if it is typical.

I got stuck in a lab assignment that required some background knowledge of computer security, and I would like to get the background info from teaching assistants.

Can I use this sentence? "Hi, I have a lack of knowledge in computer security, and I've searched the term XXX online, but I still didn't get it. Can you please explain to me what XXX means and where I suppose to look for XXX on the terminal."

Best Answer

If you're completely ignorant of the subject, you ought to say:

I'm unacquainted with computer security...

or

I'm unfamiliar with computer security...