How to work on two copies of the same image side by side without one effecting the other in photoshop

My question is similar to this Open two copies of the same file side-by-side in Photoshop the only difference being I don’t want the effect of one image being reflecting to the other. I want to see how each copy of my image looks when on different effect.

Please note that I am new to photoshop so I don’t know much about it.