- You're off to a good start.
First advice: don't rush !
You may skip the whole theory about the differences between 1, 2, and 3 point. You don't need it as an artist, it's mathematics. But one
theoretical definition is crucial
- what is a vanishing line. Perhaps more important, what is NOT a vanishing line.
A vanishing line shows
the correct direction of a real or imaginary line. And a line has at least two points. Your drawings make it clear that you don't have a clear understanding of the definition of a VL.
So, first step first, draw the VL's on this image. We will continue from there on.
Also, revisit the first post, I added an intuitive explanation.