Help me please

id be happy to help, first though I have to know what type of essay you're writing, because if it's a high school essay then if you extend the simple 5 paragraph structure it should be easy.
tips to make it longer
- increase the font size of your periods, the period itself will stay mostly the same but ill increase a little bit of the space between sentences. this is a measure you take when you're finished writing.
-don't combine words.
-separate sentences, if you think something could be a run-on sentence separate it, and you'll probably end up adding more words.
-if you're describing go into detail
-put in long quotes, don't cut things down
-don't forget to double space and follow the format

general tips
-I recommend an outline, and if it's six pages, it's a must, basically just write down the topics of each paragraph to make sure it isn't confusing.
-you're gonna want 3-6 paragraphs a page depending on the length of the paragraph and if you do research it should be pretty easy, you're gonna want 2-4 quotes per paragraph.
The best tip I can give you though is this - research is hard, but quotes are your friend so it ends up being worth all of the reading, plus any essay you write it'll mostly be you elaborating on quotes so DONT SKIMP ON RESEARCH.
oh I almost forgot, the most important thing to do, once you have your research done is a topic sentence, it is basically THE most important thing in the essay (the second being the conclusion paragraph which should summarize what the essay basically said in reverse order). Your topic sentence should introduce the main points that you would like to make in your essay and what that is going to prove. If you have a good topic sentence and a good conclusion you will be golden, like seriously, that might be the only thing your teacher focuses on in fact, some of my teachers did that at least.
I hope this helps, good luck!