How to create a rigidbody

I’m very new here, but here’s the situation
I dragged my .obj file into Unity and into my scene, looks nice and all, but now I try to add a script to it and it says it needs to be rigidbody or have one attached.

How do I make my object that I put into the scene a rigidbody?

I’m sorry, like I said, I’m very new to this, and I’ve been trying to find it all over the internet, haven’t found anything and I’m really stuck.
Thanks ahead of time!!

Select your object in your Hierarchy view and navigate to the Unity menu (top of screen): Component > Physics > Rigid Body

The easiest way that I know of is to click on your object (in the scene view, or in the hierarchy view) and scroll all the way down in the menu to the right. You should find a relatively big button saying “Add Component”. Click the button, and click “Physics”, then “Rigidbody” in the new popup menu. That’s it!