While we expect to see specific patterns in the organization and language of academic papers, we don't want to read mechanical, inauthentic work. A good writer doesn't imitate or copy someone else's techniques. Work with the skills you have.

You need not include dozens of new words from a thesaurus to enhance your material. It weakens writing if they're out of context. Vocabulary and grammar variation are essential but don't make them a mindless chore of your writing process.
Use what you're good at. Make sure it's error-free and then improve on it. Add new functions you want to perfect. You may, for instance, always use a word or phrase. Find an alternative and research its correct usage. Include it in your work and over time, it will become second nature. If you make mistakes, ask for advice and listen to feedback.