It is a good idea to read through your essay aloud. This will give you an idea of how well your language flows. For example, if you keep stumbling or run out of breath it could be because your sentences are too long or your punctuation is in the wrong place. You might wish to find an audience for this! You'll be surprised at the mistakes you sport when performing your work. You might want to record yourself while you read so that you can listen back. Or, you could ask a friend to read it out loud to you, or use software such as MS Word ‘Speak.’ .
Ideally you should leave at least a day between finishing your writing and starting to proof read. Try to plan this into your schedule. It is very easy to read what you expect to read, not what you have actually written, so you want to distance yourself from your writing and read with fresh eyes.
Could one of these techniques be useful to you?
The ultimate way of distancing yourself is to ask a trusted critical friend to read through your document.
You are, of course, responsible for checking your work but a friend will have no preconceptions and may spot things you have missed.
Do not worry about trying to find every single mistake. Nothing will ever be completely perfect. You will have have spotted mistakes in academic books, no doubt. Just aim for the best that you can do!
It is a good idea to check the referencing requirements for your course ahead of time. You could check with your tutor or look at your course handbook and guidance on Canvas.