How to replace title and tagline with an image (a logo)

I need to upload an image to replace my title and tagline on the Orbisius child theme of Twenty Twelve. If this involves coding, I am not very experienced (except with copying and pasting). Please help and be very detailed if you can. I would very much appreciate it. I do not have this theme activated yet, so I can’t provide a link. I do know how to remove the title and tagline, but I do not know how to put an image in its place..

https://www.ads-software.com/plugins/orbisius-child-theme-creator/