Turn off z-hop. When you use zhop the nozzle elevates and it cannot wipe itself. When zhop is off the nozzle wipes itself with the top layer. I know this might be a pre-sliced test but in real life scenario you can make the wall first and the infill last so any minor stringing remaining will be inside the object. As well the obligatory filament drying.

There was a software developed in Bratislava called the Comenius Logo. It was specifically developed as a programming environment for kids and we did 2 full years learning it in primary school, I’m still thankful for my teacher for making kids learn this. He shouldn’t have to do that it was not part of the program. I’m out of the education scene so I’m not sure if there are modern options to this but you may look it up as well. It uses a C-like code to move a turtle around the screen and draw shapes.