I don't want to sound like I'm dumbing things down for you but,...............
I've just bought for my 6 & 10 year old grandsons to use, 4 books titled, How to Write Poems, How to Write Emails and Letters, How To Write Stories and How To Write Reports. They were $2.99 each at Hot Dollar (A $2 shop at Wetherill Park).
The books may be presented in a 'childish' way but they cover what you need even if you are an adult. The contents include - Writing about a trip, newspaper reporting, an interview, book review, balanced report, power of persuasion, information writing, project writing and more. The book covers useful words to use, how to place your paragraphs in order, mind mapping, researching, what tense to write in, presentation, and so on. It also includes activities for practice and covers some grammar!
It covers exactly what you'll learn in a course or from an adult book - it's just written for a younger audience. For $2.99 it's worth a look anyway!
Here's some helpful links too -
http://www.dlsweb.rmit.edu.au/lsu/content/pdfs/2_AssessmentTasks/super_report.pdf
http://www.scribe.com.au/writing-tips.html
http://www.griffith.edu.au/__data/assets/pdf_file/0014/42440/Report-Writing-Tips.pdf
Can you set yourself some (pretend) reports to write and get a trusted friend to critique your work and give you feedback on ways to improve?
Are there any short courses at TAFE on report writing? Or maybe a teacher or TAFE teacher will tutor you.
Good luck
Olly