You are a wee amphibian crossing a big pond. You can hardly see the other side. Be brave and hop to that next lily pad! In other words, do the next small action step on your list.
The dissertation process is not one big task that you finish magically, but many small tasks accomplished over time. What is required is steady, consistent effort. Breaking tasks down into small, do-able 'lily pads' (one of my useful terms in working with clients) makes the job manageable.
What is the next lily pad for you? See it, gather your courage, and jump.