I did basic tracking with LibreOffice Sheets, one tab for each project. Takes a while to get the layout needed but workes pretty well for simple tacking.

I would also suggest looking at Gantt chart packages if you need something more complex. There are a ot of OpenSource ones out to get you started. Some have cloud options if you need to share.

@JaredBusch

Just a quick question, you already transitioned to Google for spam filtering, why have you discounted the GSuite option? GSuite for business might be something to consider, it would give you more options with the office type suite even if it is not used much it is still there.