educational game like mystery case files

can someone help me out making that game? i  want a game like mystery case files but the files should be garbages like paper , bottles , leaves , etc.

What sort of help are you after?

Start on the tutorials to learn the tool.
If you have a game idea, start drawing and make an outline. When you know what you want to do and have the tools to do it, then go ahead. We´ll help, but we can´t do your assignment. 

ill try my best thank u!