Noob question.

I'm attempting to discover ways to do sketches in order that I can higher talk designs with purchasers. I'd like to have the ability to do a well-scaled perspective drawing of this wall, exhibiting the window and window cavity. If my angle of assault is that shallow it means the vanishing factors could be out in my kitchen on one facet, and my bed room on the opposite facet.

Are there any ideas or tips for simulating a vanishing level {that a} fundamental carpenter like myself can perceive and make the most of?