2 hours and still nothin...HELP!

So it's the second day that we've had this blog and I am already frustrated with it! I would like to make it presentable and at least somewhat cute but first, our internet is hecka slow and second, I've been trying to figure out for 2 hours how to upload a template from another source! Not that I am really doing anything else right now but I think that is a little too long to be spending on a stupid template.

Can anyone tell me how to change my template to something a little bit more upbeat then these boring ones they provide? I know I've seen different backgrounds on everyone elses blogs so why am I not competent enough to figure this out?! Thanks to those that are willing to help....