I think it would be better to publish your work even if not all the tasks are completed.
That way I would know what exactly you are doing and what is not.
Try to complete some tasks from past lessons and write a post.
As for this construction, the winners described it very well in their works. And specifically this triangle is present in both the first and second homework tasks.
The main idea is to build additional segments, straight lines and hide unnecessary ones. After the heights are built, you should make the triangle obtuse and connect the base of the height with the vertex with an additional segment, and so on with each height