Thanks for your help! :D
At first I wasn't able to do it even with your help though, I'm such a noob ^^U
I imported an image as plane, but I didn't even know where to look for that BSDF
But I finally found it (it was in the "shading workspace", which now that I think about it, makes sense XD), so I replaced the node with yours and here is the result! :D
Yay! Thanks a lot! ^^/