Okay so i am new to unity, i made a 2D game but now i want to move on too a 3D and i am not sure how to get or add a thing that has like invontory items equips can anyone help me 
Follow the link in my sig or search my posts for a simple inventory script. Let me know if this helps…
Okay how do i add it?
I’m not sure I understand the question…
I’d put that script in the “medium” category. It’s not “hard” but it’s not “easy” either to understand.
I understand you are new to Unity. Are you new to coding/scripting as well? It’s a functioning core script, but you’ll have to plug/graft it into your game. As I don’t know what your game is, the system won’t have hooks into your game.
There is some additional information here: