What is the best way to store grid-based level data?

I am making a grid based puzzle. Each level is a field, where each cell has a sprite, rotation angle, type, and so on. I want to make each level a separate ScriptableObject to call them into a single scene. How do I best store level data (grid).

I'm new to unity, so a multidimensional array comes to mind, but there is only one type of data, and I need int, enum, float. I want it to be easy to set up levels through the inspector and easy to save / load them

thanks :D