How can I pick/throw and position object models?

Hi, Good Evening! I'm creating a First Person Puzzle game and I'm only a beginner when it comes in programming. I can only create a 3-D models and know a little bit of codes like I made (the main menu of my game). My question is how can I pick those objects that I have created in other software and imported in Unity then throw or position them in a specific place? Note that I'm creating a First Person Puzzle game. Do you have any scripts to solve my problem? :( Thanks in advance.