I want some help with proof-reading and editing my own work
The Learning Centre has a workshop which will help you learn and develop skills to identify and correct common grammatical errors [see link].
While the Learning Centre does not offer an editing and proofreading service for students, it does offer individual consultations where you can discuss improvements you wish to make.
If you are an undergraduate or postgraduate coursework student, you can make an appointment with a Learning Centre lecturer. Bring along an assignment that has already been marked as a sample of your work - the Learning Centre lecturer can then see what your problems are and advise you on how to avoid them in the future. (Unmarked work which you intend to submit cannot be edited by the Learning Centre lecturer – at most, the lecturer can give you general feedback based on reading one or two pages).
If you are a postgraduate research student, you can ask for a Learning Centre lecturer to give you feedback on your thesis (or parts of it). This feedback would include advice on structure, clarity, expression, aspects of grammar, etc, but does not involve editing and proofreading. If you wish to use this service, you should begin well before your submission date – it is a service to help you develop writing skills, not to fix up mistakes.