OMG! I Almost Erased My Whole Blog Kind Of Day.

Could anybody out there direct me to a good idiot-proof guide to changing your blog background and header? I was trying to add texture and design to this my most beloved blog. I tried to do it using the Edit HTML tab, then I erased everything. After 40 minutes of pure agony I managed to retrieve a saved template. I almost ate a whole box of chocolate to deal with the anxiety attack. I manage my nerves using chocolate. So, beloved followers and visitors, would you be darlings and help this poor soul?

PS. Thank You Lucy for being there for me.