Serious help

Hi, I am very very new to blogging so I hope you can help me with three questions:

1. I am using a theme that looks like I can add a photo of myself in the little box that says, "about me" how do I do this?

2. At the bottom of my site I want to put a @ right blup in there do you know how I can do that?

3. At the bottom of my site is something that says, "This site was powered by Smartone" theme how do I get rid of that?

Again this for all of your help and remember I am very new to this and don't know much about how to put in codes. I would also be willing to pay someone a small fee to fix the problem for me thanks