On the Plan tab, put one task per row: the task, who owns it, the start date, the duration in days, and % done. The End date, Status (Not started, In progress, Done, or OVERDUE), Days left, and the timeline bar are locked formulas — the navy bar is the planned span and the green part is what you've finished. Set the timeline's first week in cell I3; it defaults to this week, so overtype it with your project's real start.
The Dashboard counts tasks by status and shows overall completion, so a glance tells you where the project stands. Yellow cells are the only ones you type in; everything else is protected so nothing breaks. Opens in Excel or Google Sheets.