Frustrated with Blogs.MU

I am a beginner! I am having the worst time on how to put everything I want on the site. I did some research but I'm confused, I found that I should use a child theme for this (which I don't understand). Then I found that i just needed to use as is. What I want to do is have a slider on my site with text (kinda how it is shown), use my own logo with text next to it. I don't want to change the site too much cuz I like it as is but I need a slider where the pic is and I'd like the text next to it as well as the logo at top with text next to that. So, please Help!

Thank you