I would love to purchase a bunch of wall mural stickers of animals and plants like in this photo (this company makes nice ones). But I feel overwhelmed to figure out how to arrange them on the walls. Does anyone have any suggestions?

I'm going to do this in an adult space (not kids). I have two walls similar to this picture, but with even more room.

I want to sort of create a sea to jungle kind of scene. Like underwater on one end and treetop on the other.

Should I start with ocean near the window? Or on the other wall?

Please help.
thanks