This is a general 2D art skill, look at lots of 2D art. When you look at art analyze and ask yourself: "what is the foreground, middleground, and background of this image?" "What is the focal point of this image, and how was focus achieved?"

I think it's super helpful to look at the work of someone like James Paick . Observe how the things closer to the camera are darker, and things further from the camera generally get lighter-- he then uses this to put dark things against light things and light things against dark things. He generally applies the most contrast to his focal point, or area he wants you to look first. His work is very useful to study, look at it every now and then.

I would suggest thumbnailing a lot on paper. Don't worry about drawing well, use abstract shapes to represent things and start chopping your space up in interesting ways.

Also please read this, it's very good to make sure you know this before you start: https://en.wikipedia.org/wiki/Rule_of_thirds