As others have said, it's easy to do your own CV properly. However it may be an idea to perhaps look at your english skills then tackle it.
Collins "Improve your writing skills" book is a worth read.
The key to the CV is knowing what it's for - it is for you to sell yourself to gain an invitation to an interview. Nothing more, nothing less.
Next it's important to understand who will be reading it. Often these people are filtering hundreds of CVs. So it has to be clear, concise and relevant as you have 15-30 seconds to avoid the reject bin.
1-2 pages maximum. This is not about what you did in your holidays, it's about a concise list of things you have experience in.
It should be also understood that a considerable amount of CV searching goes on by keyword. Thus you need to understand these and understand their relevance to your CV. I've had many "I've found your CV whilst searching <jobsite>" calls.
Next is the wording. Language is everything - positive action words should communicate to the reader what you have done. You're not interested in saying what you haven't or limitations, that's what an interview is for to scope out.
Write clearly using verbs and nouns whilst avoiding adverbs.
The format of the CV depends on the job. A fresh graduate or research position would focus heavily on education. When experience is king then the focus will be on your previous work experience. When achievement is king (sales/director), then the addition of financial achievements will come first.
Writing a CV and getting just right is actually difficult. You're attempting to condense your worldly value into a short description.