There's no hard and fast rule, and it depends how many drafts you're thinking of doing before the final version.
If this is the only draft, I would aim higher than the limit.
So for a 300 word essay, I would probably first write a draft of 600 words.
I wouldn't double every draft I write, it's just that this is super short.
The thing is that there are so many types of essays, so many peculiarities, that even the length of your paper might affect the way you complete it.
So, this time you want to get answers to your questions about 500-word essays and we’re going to help you with it.
Whatever steps you need to take to get there will vary from person to person.
However, if you are writing this for a class and your rough draft is going to be reviewed, then the word count may very well matter.
I'm in grade 9, and I have to write an essay on the environmental issues in Alberta.
My teacher said that the intro should be 3-5 sentences, and then the 3 body paragraphs should be 7-10 sentences.