backgrounds and cameras

I’m using a drawing to set everything in place. What is the easiest and fastest way to get my camera in the right place so that my rendered pic turns out to match my drawing? I think I took the long and difficult road last time and would like to avoid it in the future. Thanks.

In object mode you can use “File --> Import --> Images as Planes” to import your picture.
After importing you may adjust the plane to match the standard coordinate system by rotating it 90° on the x-axis by pressing <X>, <90>, <Enter>

Then you can adjust the standard camera to show the maximum of your imported picture with “View --> Align View -->Align Active Camera to Selected”.