For this exercise, I put together a quick floor plan to show these steps:
*Keep in my mind that it is more accurate when you have the dimensions such as the height of the ceiling (the space could have high ceilings) or the height of the windows and their location. When we have all the details sorted out, we clean up the lines so the elevation looks more presentable, shown on the picture below. ( taking it to photoshop and post-processing it would be my next step)
If you only have autocad as a software where you work on your construction documents, these steps will help in creating your elevations. Any comments? Let me know if you have any questions and I will gladly answer as soon as possible! Thank you!