Enough comes after adjectives and adverbs:
It wasn't good enough. (Good is an adjective)
I didn't do well enough. (Well in an adverb)
Enough comes before nouns:
I didn't have enough money. (Money is a noun)
We use enough of before the and this, that, these & those:
Are there enough of the copies I made for everybody?
I've had enough of this rubbish.
We also use enough of before object personal pronouns:
Were enough of them there last night?
NB Sometimes people put enough after a noun, but this is for effect as it sounds a bit archaic and formal.
Enough can be used before an infinitive:
They don't have enough to eat.