Here's why:
* "Information" is an uncountable noun: It refers to a general concept and cannot be counted individually like apples or books.
* "Few" is used for countable nouns: It implies a small number of something you can count.
Correct ways to say it:
* "A little information" (for small amounts)
* "Some information" (for a general amount)
* "A few details" (if you want to focus on specific details)
* "A few pieces of information" (if you want to emphasize individual pieces)