Your Ph.D. thesis isn't something you want to write twice. So, you need to make sure that you put in your all the first time you try. The last thing you want to do is submit a thesis that isn't up to standard. The content of your thesis is meant to be a reflection of everything you've worked on for the years leading up to your thesis writing and presentation. If you don't know how to write a thesis, you'll need to learn as much as you can before you start. You also need to remember that no matter how hard you try, your supervisors will always have notes and corrections for you. The more you know before you start, the lower the chances of your supervisors asking for multiple revisions.
Your outline is the map that you would use throughout your writing. You should structure your outline with your supervisor. Break your outline into three sections - the introduction, body, and conclusion. It's going to be a long project, so make sure your outline is extensive. Use numbers and bullet points to list every part of the thesis you're going to work on in the outline. If your supervisor thinks the structure is ideal, you can proceed to write.
When it comes to writing your thesis, there is no need to summarize or make things brief. Feel free to write lengthy introductions and conclusions. Because your thesis is going to be made up of thousands of words, a single-page introduction and conclusion aren't going to cut it. Put effort into making it extensive. When you write a short introduction, you tell the reader that you lack a deep understanding of what you're writing. When you write a short conclusion, you tell the reader that you are not in control. Make sure that the majority of your research comes from offline sources. Depending too much on the content you get from Google may have you referencing opinionated articles rather than facts.
After organizing your outline and research, the next step is to start writing the dissertation. Make sure that everything you do is written in correct English. Your work should be free of typographical and grammatical errors. Proofreading the entire thesis may not be easy on your own. So, consider paying for professional proofreading services. Many experts can do a custom thesis for you. These experts will be happy to read your content and correct grammatical errors for you. If you want, they can provide thesis writing tutoring services for you at a fair price.
Completing your Ph.D. program is one of the most significant milestones you'll cross in your academic life. So, there is nothing wrong with asking a professional for help. It takes a lot of dedication, resources, and time. However, it's going to be worth it when you are awarded the title of "Doctor" along with the new degree.