Welcome to the forums @OllieOmlette!
Can you explain a bit more what you are trying to do? I'm confused at what you mean by "at a vertical" and "how to get it vertical in the game".
Are you meaning moving the object up/down relative to the world rather than to the scene? If you are in the Godot editor, you can click a little square button in the top bar of the 3D scene view and that will change the transform tools from global mode to local mode and vice versa.
If you are moving the object through code, you can use global_transform.origin += offset_here to move the object globally. For example: global_transform.origin += Vector3(0, 0.1, 0) will move the object by 0.1 units up.
If you want to move an object relative to its parent node in code, you can use transform.origin += offset_here.
As far as tutorials go, this tutorial looks like it may be a good start for 3D Godot development:
