I have a new chart for you.
The difference between FEW, A FEW, LITTLE and A LITTLE in English.
(These are known grammatically as quantifiers)
There are more notes at the bottom of this page: Much, Many, Lot, Few, Little which includes more example sentences.
Once you feel comfortable with the difference, try our interactive game where you need to complete the space with either FEW or LITTLE (or a few or a little, depending on the sentence). Few vs Little Game