Thank you for your post.
You are using the correct tool, the Create a Route and Navigation tool is what you need to use. There is only slight customization that may help in what you are trying to do. Please follow these steps:
Avenza Maps > Settings > Navigation > change the Arrival Radius and the Navigate to each point in turn.
Change Arrival Radius to 10m and turn on Navigate to each point in turn if not on already.
Unfortunately, that is all you can customize currently. While you are navigating and following the route it should give you the ETA for the track as well as the time to the next point.
If those settings are sufficient please let me know and I can put in a feature request for you.