Help setting up child theme

– I have imported the XML (Twenty Eleven-Child)file into WP on my domain.
– I was following the instructions from the “upgrade” on Twenty Eleven but then i ran into a problem on the directories at my domain and I had to wait until Support sorted it out.
– Now that everything is working again, I can’t find the original Twenty Eleven-Child instructions so that I can complete this website.

Also, I am finding the instructions somewhat confusing and I would appreciate it if someone would help me along the way.

My website is a simple one, but it’s been a real challenge for me over the past 2 months and it shouldn’t be…. maybe i’m just thick!!!

Anyway, at the moment when I display my site am getting both “child” and then the “parent” so I need to know how to stop the parent from coming up and then modify the child.

Thanks, Monaleasaa

PS.. I really want to get this straight in my head because I like working with WP, but I am in need of help…lol