I'm supposed to change my essay from 326 words to 1700 words in the next 36 hours (update: i only changed it to 799 words)

Define every key word. Add an exemple for each concept, a second if you had one already. Give a counterargument to your opinion then proceed to explain how it doesn't convince you. Add connecting word and look for two words synonyms where there is already some.
Go sleep early and wake up the same. Don't overcaffeinate.

Good luck.