True facts about doctoral thesis
It will take a very long time. You might want to believe in false idols like the one who tells you that you can get this project done in a matter of weeks, but do not give in to that belief. This project is just as long as any other thesis you have composed.
You need to create a meeting schedule with your review committee or advisor. If you have an advisor or review committee who is assigned to helping you throughout this process, you need to make your working schedule with them early on. They are just as busy, if not more so, than you are and they are doing you a favor by meeting with you regularly. So of course you want to take advantage of this opportunity, but you should do so respectfully. Ask them what days of the week are best for submitting drafts of your chapters and which days in the subsequent week are good for meeting to discuss previously submitted chapters. They might prefer you submit each chapter on a Thursday for review and meet the following Tuesday. They might prefer to handle everything during the week. You will never know until you ask.