Essay's usually aren't as hard to write yourself as people make out. All you need to do is know what structure the examiner or audience is looking for. My EPQ essay needs a 1000 word introduction, in the 1st month of doing the intro I managed to just about squeeze up to 200 words, but it turns out the intro can include background information about the field which the essay is on (which would have been my 1st paragraph after the intro). In just about 3 hours of writing and reading I got together about 8 sources, of which I already got in pieces to credit three of them as research material, and 800 words.
Now, a little tip, which everyone else seems to go totally against. Try to start your research with Wikipedia, but don't use it to get the final information and do not mention Wikipedia in your essay. Wikipedia can often be a brilliant source to get a rough outline of your topic, you can then use information such as names, experiments or events you learn about from Wikipedia as your key search terms on google, to then find papers and more credible sources to use in your essay. Google also has a nice feature for you. You can search for scholarly papers on Google, and any scholarly paper is usually a really good source.
Obviously, adjust that little method of research to fit your essay better. Each essay is slightly different, so needs a slightly different approach.