No, you can't say "an information". You could say "a piece of information". As always context is king!

Although "information" begins with a vowel (i), you do not put "an" in-front of it, rather 'some' information. Hope this helps.

dear Mandy thanks a lot

The word 'information' is used whether you mean singular or plural. 'An' is used before a word beginning with a vowel. For example - I have an appetite. But you could say - I have some information about the topic. Please provide information about yourself.

thank you Mr. Nanren