Nouns can be countable and uncountable.
Countable = you can count them (apple / apples, table / tables, cup / cups, etc.)
Uncountable = you cannot count them (geography, money, water, rice, etc.)
We use the indefinite article a / an with singular countable nouns: a banana, an apple, an igloo, etc.
We cannot use an indefinite article with uncountable nouns but we can use a…of: a carton of milk, a bowl of soup, etc.
We can use some and any with both countable and uncountable nouns.
We bought some apples.
Have you got any bananas?
I drank some juice.
Have you got any rice?
We use many and few with countable nouns.
We bought many tomatoes.
She had a few books she shared with me.
We use much and little with uncountable nouns.
We didn’t do much work.
I have a little housework to do.