My First Blog

So I just signed up on this site and am trying to figure this whole thing out, yikes?? Hmm I can't seem to get my page to look like I want it to? I want to add in a banner pic at the top of my page but it is way too large and I can't seem to find anywhere that will tell me how much to resize the image to? So I got tired of that and decided I might as well trying writing something and posting it so here it goes...
Well I can't seem to think of a thing to write because I have become obsessed with figuring out how to make the changes I want to my blog page, ha. Might was well just post this to see how it works...