LAYOUT HELP & NEW RP

Okay, so I recently made a new Roleplay called "White Tiger Entertainment" and I want it to have a layout for the description and rules.

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I found the perfect layout for that but the problem is that I don't know how to change the pictures to the ones I want them to be

Does anyone know how to change the pictures or tell me how to do it?!

i really need help here, someone PLEASE HELP ME!! Dx