In the two-point perspective scheme, our line of sight is directed diagonally relatively to the bases of the buildings. And we have two melting points: one from the left, another from the right, each one for one set of the parallel lines. Only lines of the vertical set are vertical. This type of linear perspective has its flaw: usually, both melting points are far away outside of our sketch page.
To deal with this kind of problem, we use the perspective grid. In this case, we adjust the orthogonal lines not to the melting points but to sidelines of our grid, which are inside of our page.
You don’t need any experience in drawing. And a minimum drawing set: sketchbook, pencils, and eraser is enough. Also, we use our gridded device and we need a snap-off knife to cut a strip of paper for measuring angles.