One online tool that I've found to be really helpful is Pacemaker Planner (pacemaker.press). You can have up to two plans on the free level, which is plenty for me right now. I really love being able to set a time-based goal, track how much I write each day (the daily writing streak is really motivating!), and use the calendar view to monitor my progress and how far I have left to go. If you're a planner like I am or appreciate visual data to help keep you on track with a big project like writing or editing, this might be a tool worth checking out. They do have paid levels for even more features, but their free tier is quite robust.
If you do check it out, please report back and let me know what you think!