Best way to diffuse or soften a 18" Round LED Panel

Hey all, I'll preface by saying I probably made the wrong purchase but here I am...

What's the best method to soften the light coming form this: "NEEWER GR18C 18" LED Round Panel Video Light" (Not linking in case it's not allowed)

Neewer doesn't have an attachment so I'm curious if any of you have ideas.

Thanks!